forked from osmocom/wireshark
![Guy Harris](/assets/img/avatar_default.png)
that obviates the need to check for a null capture filter string, and fixes bug 1055. Keep track of whether it was set from the command line, though, so we can catch attempts to set the filter more than once, and attempts to set it when we're not capturing. Clean up white space. svn path=/trunk/; revision=19047
3081 lines
97 KiB
C
3081 lines
97 KiB
C
/* tshark.c
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* Text-mode variant, by Gilbert Ramirez <gram@alumni.rice.edu>
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* and Guy Harris <guy@alum.mit.edu>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <locale.h>
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#include <limits.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <errno.h>
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#include <signal.h>
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#ifdef HAVE_SYS_STAT_H
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# include <sys/stat.h>
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#endif
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#ifdef NEED_STRERROR_H
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#include "strerror.h"
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#endif
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#ifdef NEED_GETOPT_H
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#include "getopt.h"
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#endif
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#include <glib.h>
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#include <epan/epan.h>
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#include <epan/filesystem.h>
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#include <epan/privileges.h>
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#include <wiretap/file_util.h>
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#include "globals.h"
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#include <epan/timestamp.h>
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#include <epan/packet.h>
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#include "file.h"
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#include "disabled_protos.h"
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#include <epan/prefs.h>
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#include <epan/column.h>
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#include "print.h"
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#include <epan/addr_resolv.h>
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#include "util.h"
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#include "clopts_common.h"
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#include "cmdarg_err.h"
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#include "version_info.h"
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#include <epan/conversation.h>
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#include <epan/plugins.h>
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#include "register.h"
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#include "conditions.h"
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#include "capture_stop_conditions.h"
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#include "ringbuffer.h"
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#include "capture_ui_utils.h"
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#include <epan/epan_dissect.h>
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#include <epan/tap.h>
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#include <epan/stat_cmd_args.h>
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#include <epan/timestamp.h>
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#include <epan/ex-opt.h>
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#ifdef HAVE_LIBPCAP
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#include <pcap.h>
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#include <setjmp.h>
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#include "capture-pcap-util.h"
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#include "pcapio.h"
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#include <wiretap/wtap-capture.h>
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#ifdef _WIN32
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#include "capture-wpcap.h"
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#include "capture_errs.h"
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#endif /* _WIN32 */
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#include "capture.h"
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#include "capture_loop.h"
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#include "capture_sync.h"
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#endif /* HAVE_LIBPCAP */
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#include "epan/emem.h"
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#include "log.h"
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#include <epan/funnel.h>
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/*
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* This is the template for the decode as option; it is shared between the
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* various functions that output the usage for this parameter.
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*/
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static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
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static nstime_t first_ts;
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static nstime_t prev_ts;
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static GString *comp_info_str, *runtime_info_str;
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static gboolean print_packet_info; /* TRUE if we're to print packet information */
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/*
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* The way the packet decode is to be written.
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*/
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typedef enum {
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WRITE_TEXT, /* summary or detail text */
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WRITE_XML /* PDML or PSML */
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/* Add CSV and the like here */
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} output_action_e;
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static output_action_e output_action;
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static gboolean do_dissection; /* TRUE if we have to dissect each packet */
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static gboolean verbose;
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static gboolean print_hex;
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static gboolean line_buffered;
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static guint32 cum_bytes = 0;
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static print_format_e print_format = PR_FMT_TEXT;
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static print_stream_t *print_stream;
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/*
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* Standard secondary message for unexpected errors.
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*/
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static const char please_report[] =
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"Please report this to the Wireshark developers";
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#ifdef HAVE_LIBPCAP
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/*
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* TRUE if we're to print packet counts to keep track of captured packets.
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*/
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static gboolean print_packet_counts;
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static loop_data ld;
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#ifdef HAVE_LIBPCAP
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static capture_options capture_opts;
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#ifdef SIGINFO
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static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
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static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
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#endif /* SIGINFO */
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#endif /* HAVE_LIBPCAP */
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static int capture(void);
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static void capture_pcap_cb(u_char *, const struct pcap_pkthdr *,
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const u_char *);
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static void report_counts(void);
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#ifdef _WIN32
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static BOOL WINAPI capture_cleanup(DWORD);
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#else /* _WIN32 */
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static void capture_cleanup(int);
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#ifdef SIGINFO
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static void report_counts_siginfo(int);
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#endif /* SIGINFO */
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#endif /* _WIN32 */
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#endif /* HAVE_LIBPCAP */
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static int load_cap_file(capture_file *, char *, int);
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static gboolean process_packet(capture_file *cf, long offset,
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const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
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const guchar *pd);
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static void show_capture_file_io_error(const char *, int, gboolean);
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static void show_print_file_io_error(int err);
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static gboolean write_preamble(capture_file *cf);
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static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
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static gboolean write_finale(void);
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static const char *cf_open_error_message(int err, gchar *err_info,
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gboolean for_writing, int file_type);
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static void open_failure_message(const char *filename, int err,
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gboolean for_writing);
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static void failure_message(const char *msg_format, va_list ap);
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static void read_failure_message(const char *filename, int err);
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capture_file cfile;
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static void list_capture_types(void) {
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int i;
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fprintf(stderr, "editcap: The available capture file types for \"F\":\n");
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for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
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if (wtap_dump_can_open(i))
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fprintf(stderr, " %s - %s\n",
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wtap_file_type_short_string(i), wtap_file_type_string(i));
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}
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}
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static void
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print_usage(gboolean print_ver)
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{
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FILE *output;
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if (print_ver) {
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output = stdout;
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fprintf(output,
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"TShark " VERSION "%s\n"
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"Dump and analyze network traffic.\n"
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"See http://www.wireshark.org for more information.\n"
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"\n"
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"%s",
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svnversion, get_copyright_info());
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} else {
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output = stderr;
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}
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fprintf(output, "\n");
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fprintf(output, "Usage: tshark [options] ...\n");
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fprintf(output, "\n");
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#ifdef HAVE_LIBPCAP
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fprintf(output, "Capture interface:\n");
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fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
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fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
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fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
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fprintf(output, " -p don't capture in promiscuous mode\n");
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#ifdef _WIN32
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fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
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#endif
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fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
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fprintf(output, " -D print list of interfaces and exit\n");
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fprintf(output, " -L print list of link-layer types of iface and exit\n");
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fprintf(output, "\n");
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fprintf(output, "Capture stop conditions:\n");
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fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
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fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
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fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
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fprintf(output, " files:NUM - stop after NUM files\n");
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/*fprintf(output, "\n");*/
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fprintf(output, "Capture output:\n");
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fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
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fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
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fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
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#endif /* HAVE_LIBPCAP */
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/*fprintf(output, "\n");*/
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fprintf(output, "Input file:\n");
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fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
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fprintf(output, "\n");
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fprintf(output, "Processing:\n");
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fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
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fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
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fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
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fprintf(output, " -d %s ...\n", decode_as_arg_template);
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fprintf(output, " \"Decode As\", see the man page for details\n");
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fprintf(output, " Example: tcp.port==8888,http\n");
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/*fprintf(output, "\n");*/
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fprintf(output, "Output:\n");
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fprintf(output, " -w <outfile|-> set the output filename (or '-' for stdout)\n");
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fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
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fprintf(output, " an empty \"-F\" option will list the file types\n");
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fprintf(output, " -V add output of packet tree (Packet Details)\n");
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fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
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fprintf(output, " -T pdml|ps|psml|text output format of text output (def: text)\n");
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fprintf(output, " -t ad|a|r|d output format of time stamps (def: r: rel. to first)\n");
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fprintf(output, " -l flush output after each packet\n");
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fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
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fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
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fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
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fprintf(output, "\n");
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fprintf(output, "Miscellaneous:\n");
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fprintf(output, " -h display this help and exit\n");
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fprintf(output, " -v display version info and exit\n");
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fprintf(output, " -o <name>:<value> ... override preference setting\n");
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}
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/*
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* For a dissector table, print on the stream described by output,
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* its short name (which is what's used in the "-d" option) and its
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* descriptive name.
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*/
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static void
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display_dissector_table_names(char *table_name, const char *ui_name,
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gpointer output)
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{
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fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
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}
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/*
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* For a dissector handle, print on the stream described by output,
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* the filter name (which is what's used in the "-d" option) and the full
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* name for the protocol that corresponds to this handle.
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*/
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static void
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display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
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{
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int proto_id;
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const gchar* proto_filter_name;
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const gchar* proto_ui_name;
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proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
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if (proto_id != -1) {
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proto_filter_name = proto_get_protocol_filter_name(proto_id);
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proto_ui_name = proto_get_protocol_name(proto_id);
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g_assert(proto_filter_name != NULL);
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g_assert(proto_ui_name != NULL);
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fprintf((FILE *)output, "\t%s (%s)\n",
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proto_filter_name,
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proto_ui_name);
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}
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}
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/*
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* The protocol_name_search structure is used by find_protocol_name_func()
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* to pass parameters and store results
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*/
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struct protocol_name_search{
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gchar *searched_name; /* Protocol filter name we are looking for */
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dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
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guint nb_match; /* How many dissectors matched searched_name */
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};
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typedef struct protocol_name_search *protocol_name_search_t;
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/*
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* This function parses all dissectors associated with a table to find the
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* one whose protocol has the specified filter name. It is called
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* as a reference function in a call to dissector_table_foreach_handle.
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* The name we are looking for, as well as the results, are stored in the
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* protocol_name_search struct pointed to by user_data.
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* If called using dissector_table_foreach_handle, we actually parse the
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* whole list of dissectors.
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*/
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static void
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find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
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{
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int proto_id;
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const gchar *protocol_filter_name;
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protocol_name_search_t search_info;
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g_assert(handle);
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search_info = (protocol_name_search_t)user_data;
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proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
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if (proto_id != -1) {
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protocol_filter_name = proto_get_protocol_filter_name(proto_id);
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g_assert(protocol_filter_name != NULL);
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if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
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/* Found a match */
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if (search_info->nb_match == 0) {
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/* Record this handle only if this is the first match */
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search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
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}
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search_info->nb_match++;
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}
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}
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}
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/*
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* Print all layer type names supported.
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* We send the output to the stream described by the handle output.
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*/
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static void
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fprint_all_layer_types(FILE *output)
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{
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dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
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}
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/*
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* Print all protocol names supported for a specific layer type.
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* table_name contains the layer type name in which the search is performed.
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* We send the output to the stream described by the handle output.
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*/
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static void
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fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
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{
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dissector_table_foreach_handle(table_name,
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display_dissector_names,
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(gpointer)output);
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}
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/*
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* The function below parses the command-line parameters for the decode as
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* feature (a string pointer by cl_param).
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* It checks the format of the command-line, searches for a matching table
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* and dissector. If a table/dissector match is not found, we display a
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* summary of the available tables/dissectors (on stderr) and return FALSE.
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* If everything is fine, we get the "Decode as" preference activated,
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* then we return TRUE.
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*/
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static gboolean
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add_decode_as(const gchar *cl_param)
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{
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gchar *table_name;
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guint32 selector;
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gchar *decoded_param;
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gchar *remaining_param;
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gchar *selector_str;
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gchar *dissector_str;
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dissector_handle_t dissector_matching;
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dissector_table_t table_matching;
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ftenum_t dissector_table_selector_type;
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struct protocol_name_search user_protocol_name;
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/* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
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g_assert(cl_param);
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decoded_param = g_malloc( sizeof(gchar) * (strlen(cl_param) + 1) ); /* Allocate enough space to have a working copy of the command-line parameter */
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g_assert(decoded_param);
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strcpy(decoded_param, cl_param);
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/* The lines below will parse this string (modifying it) to extract all
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necessary information. Note that decoded_param is still needed since
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strings are not copied - we just save pointers. */
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/* This section extracts a layer type (table_name) from decoded_param */
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table_name = decoded_param; /* Layer type string starts from beginning */
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remaining_param = strchr(table_name, '=');
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if (remaining_param == NULL) {
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cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
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/* If the argument does not follow the template, carry on anyway to check
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if the table name is at least correct. If remaining_param is NULL,
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we'll exit anyway further down */
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}
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else {
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*remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
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}
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/* Remove leading and trailing spaces from the table name */
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while ( table_name[0] == ' ' )
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table_name++;
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while ( table_name[strlen(table_name) - 1] == ' ' )
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table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
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/* The following part searches a table matching with the layer type specified */
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table_matching = NULL;
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/* Look for the requested table */
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if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
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cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
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}
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else {
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table_matching = find_dissector_table(table_name);
|
|
if (!table_matching) {
|
|
cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
|
|
}
|
|
}
|
|
|
|
if (!table_matching) {
|
|
/* Display a list of supported layer types to help the user, if the
|
|
specified layer type was not found */
|
|
cmdarg_err("Valid layer types are:");
|
|
fprint_all_layer_types(stderr);
|
|
}
|
|
if (remaining_param == NULL || !table_matching) {
|
|
/* Exit if the layer type was not found, or if no '=' separator was found
|
|
(see above) */
|
|
g_free(decoded_param);
|
|
return FALSE;
|
|
}
|
|
|
|
if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
|
|
cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
|
|
}
|
|
else {
|
|
remaining_param++; /* Move to the second '=' */
|
|
*remaining_param = '\0'; /* Remove the second '=' */
|
|
}
|
|
remaining_param++; /* Position after the layer type string */
|
|
|
|
/* This section extracts a selector value (selector_str) from decoded_param */
|
|
|
|
selector_str = remaining_param; /* Next part starts with the selector number */
|
|
|
|
remaining_param = strchr(selector_str, ',');
|
|
if (remaining_param == NULL) {
|
|
cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
|
|
/* If the argument does not follow the template, carry on anyway to check
|
|
if the selector value is at least correct. If remaining_param is NULL,
|
|
we'll exit anyway further down */
|
|
}
|
|
else {
|
|
*remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
|
|
}
|
|
|
|
dissector_table_selector_type = get_dissector_table_selector_type(table_name);
|
|
|
|
switch (dissector_table_selector_type) {
|
|
|
|
case FT_UINT8:
|
|
case FT_UINT16:
|
|
case FT_UINT24:
|
|
case FT_UINT32:
|
|
/* The selector for this table is an unsigned number. Parse it as such.
|
|
There's no need to remove leading and trailing spaces from the
|
|
selector number string, because sscanf will do that for us. */
|
|
if ( sscanf(selector_str, "%u", &selector) != 1 ) {
|
|
cmdarg_err("Invalid selector number \"%s\"", selector_str);
|
|
g_free(decoded_param);
|
|
return FALSE;
|
|
}
|
|
break;
|
|
|
|
case FT_STRING:
|
|
case FT_STRINGZ:
|
|
/* The selector for this table is a string. */
|
|
break;
|
|
|
|
default:
|
|
/* There are currently no dissector tables with any types other
|
|
than the ones listed above. */
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
if (remaining_param == NULL) {
|
|
/* Exit if no ',' separator was found (see above) */
|
|
cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
|
|
fprint_all_protocols_for_layer_types(stderr, table_name);
|
|
g_free(decoded_param);
|
|
return FALSE;
|
|
}
|
|
|
|
remaining_param++; /* Position after the selector number string */
|
|
|
|
/* This section extracts a protocol filter name (dissector_str) from decoded_param */
|
|
|
|
dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
|
|
|
|
/* Remove leading and trailing spaces from the dissector name */
|
|
while ( dissector_str[0] == ' ' )
|
|
dissector_str++;
|
|
while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
|
|
dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
|
|
|
|
dissector_matching = NULL;
|
|
|
|
/* We now have a pointer to the handle for the requested table inside the variable table_matching */
|
|
if ( ! (*dissector_str) ) { /* Is the dissector name empty, if so, don't even search for a matching dissector and display all dissectors found for the selected table */
|
|
cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
|
|
}
|
|
else {
|
|
user_protocol_name.nb_match = 0;
|
|
user_protocol_name.searched_name = dissector_str;
|
|
user_protocol_name.matched_handle = NULL;
|
|
|
|
dissector_table_foreach_handle(table_name, find_protocol_name_func, &user_protocol_name); /* Go and perform the search for this dissector in the this table's dissectors' names and shortnames */
|
|
|
|
if (user_protocol_name.nb_match != 0) {
|
|
dissector_matching = user_protocol_name.matched_handle;
|
|
if (user_protocol_name.nb_match > 1) {
|
|
cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
|
|
}
|
|
}
|
|
else {
|
|
/* OK, check whether the problem is that there isn't any such
|
|
protocol, or that there is but it's not specified as a protocol
|
|
that's valid for that dissector table.
|
|
Note, we don't exit here, but dissector_matching will remain NULL,
|
|
so we exit below */
|
|
if (proto_get_id_by_filter_name(dissector_str) == -1) {
|
|
/* No such protocol */
|
|
cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
|
|
} else {
|
|
cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
|
|
dissector_str, table_name);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!dissector_matching) {
|
|
cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
|
|
fprint_all_protocols_for_layer_types(stderr, table_name);
|
|
g_free(decoded_param);
|
|
return FALSE;
|
|
}
|
|
|
|
/* This is the end of the code that parses the command-line options.
|
|
All information is now stored in the variables:
|
|
table_name
|
|
selector
|
|
dissector_matching
|
|
The above variables that are strings are still pointing to areas within
|
|
decoded_parm. decoded_parm thus still needs to be kept allocated in
|
|
until we stop needing these variables
|
|
decoded_param will be deallocated at each exit point of this function */
|
|
|
|
|
|
/* We now have a pointer to the handle for the requested dissector
|
|
(requested protocol) inside the variable dissector_matching */
|
|
switch (dissector_table_selector_type) {
|
|
|
|
case FT_UINT8:
|
|
case FT_UINT16:
|
|
case FT_UINT24:
|
|
case FT_UINT32:
|
|
/* The selector for this table is an unsigned number. */
|
|
dissector_change(table_name, selector, dissector_matching);
|
|
break;
|
|
|
|
case FT_STRING:
|
|
case FT_STRINGZ:
|
|
/* The selector for this table is a string. */
|
|
dissector_change_string(table_name, selector_str, dissector_matching);
|
|
break;
|
|
|
|
default:
|
|
/* There are currently no dissector tables with any types other
|
|
than the ones listed above. */
|
|
g_assert_not_reached();
|
|
}
|
|
g_free(decoded_param); /* "Decode As" rule has been succesfully added */
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
log_func_ignore (const gchar *log_domain _U_, GLogLevelFlags log_level _U_,
|
|
const gchar *message _U_, gpointer user_data _U_)
|
|
{
|
|
}
|
|
|
|
static char *
|
|
output_file_description(const char *fname)
|
|
{
|
|
char *save_file_string;
|
|
|
|
/* Get a string that describes what we're writing to */
|
|
if (strcmp(fname, "-") == 0) {
|
|
/* We're writing to the standard output */
|
|
save_file_string = g_strdup("standard output");
|
|
} else {
|
|
/* We're writing to a file with the name in save_file */
|
|
save_file_string = g_strdup_printf("file \"%s\"", fname);
|
|
}
|
|
return save_file_string;
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
char *init_progfile_dir_error;
|
|
int opt, i;
|
|
extern char *optarg;
|
|
gboolean arg_error = FALSE;
|
|
|
|
#ifdef _WIN32
|
|
WSADATA wsaData;
|
|
#endif /* _WIN32 */
|
|
|
|
char *gpf_path, *pf_path;
|
|
char *gdp_path, *dp_path;
|
|
int gpf_open_errno, gpf_read_errno;
|
|
int pf_open_errno, pf_read_errno;
|
|
int gdp_open_errno, gdp_read_errno;
|
|
int dp_open_errno, dp_read_errno;
|
|
int err;
|
|
#ifdef HAVE_LIBPCAP
|
|
gboolean list_link_layer_types = FALSE;
|
|
gboolean start_capture = FALSE;
|
|
#else
|
|
gboolean capture_option_specified = FALSE;
|
|
#endif
|
|
gboolean quiet = FALSE;
|
|
int out_file_type = WTAP_FILE_PCAP;
|
|
gchar *cf_name = NULL, *rfilter = NULL;
|
|
#ifdef HAVE_PCAP_OPEN_DEAD
|
|
struct bpf_program fcode;
|
|
#endif
|
|
dfilter_t *rfcode = NULL;
|
|
e_prefs *prefs;
|
|
char badopt;
|
|
GLogLevelFlags log_flags;
|
|
int status;
|
|
|
|
#define OPTSTRING_INIT "a:b:c:d:Df:F:hi:lLnN:o:pqr:R:s:St:T:vVw:xX:y:z:"
|
|
#ifdef HAVE_LIBPCAP
|
|
#ifdef _WIN32
|
|
#define OPTSTRING_WIN32 "B:"
|
|
#else
|
|
#define OPTSTRING_WIN32 ""
|
|
#endif /* _WIN32 */
|
|
#else
|
|
#define OPTSTRING_WIN32 ""
|
|
#endif /* HAVE_LIBPCAP */
|
|
|
|
static const char optstring[] = OPTSTRING_INIT OPTSTRING_WIN32;
|
|
|
|
/*
|
|
* Attempt to get the pathname of the executable file.
|
|
*/
|
|
init_progfile_dir_error = init_progfile_dir(argv[0]);
|
|
if (init_progfile_dir_error != NULL) {
|
|
fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
|
|
init_progfile_dir_error);
|
|
}
|
|
|
|
/*
|
|
* Get credential information for later use.
|
|
*/
|
|
get_credential_info();
|
|
|
|
/* nothing more than the standard GLib handler, but without a warning */
|
|
log_flags =
|
|
G_LOG_LEVEL_ERROR|
|
|
G_LOG_LEVEL_CRITICAL|
|
|
G_LOG_LEVEL_WARNING|
|
|
G_LOG_LEVEL_MESSAGE|
|
|
G_LOG_LEVEL_INFO|
|
|
G_LOG_LEVEL_DEBUG|
|
|
G_LOG_FLAG_FATAL|G_LOG_FLAG_RECURSION;
|
|
|
|
g_log_set_handler(NULL,
|
|
log_flags,
|
|
log_func_ignore, NULL /* user_data */);
|
|
g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,
|
|
log_flags,
|
|
log_func_ignore, NULL /* user_data */);
|
|
|
|
/* initialize memory allocation subsystem */
|
|
ep_init_chunk();
|
|
se_init_chunk();
|
|
|
|
/* initialize the GUID to name mapping table */
|
|
guids_init();
|
|
|
|
initialize_funnel_ops();
|
|
|
|
#ifdef HAVE_LIBPCAP
|
|
capture_opts_init(&capture_opts, NULL /* cfile */);
|
|
#endif
|
|
|
|
timestamp_set_type(TS_RELATIVE);
|
|
timestamp_set_precision(TS_PREC_AUTO);
|
|
|
|
/* Register all dissectors; we must do this before checking for the
|
|
"-G" flag, as the "-G" flag dumps information registered by the
|
|
dissectors, and we must do it before we read the preferences, in
|
|
case any dissectors register preferences. */
|
|
epan_init(PLUGIN_DIR,register_all_protocols,register_all_protocol_handoffs,
|
|
failure_message,open_failure_message,read_failure_message);
|
|
|
|
/* Register all tap listeners; we do this before we parse the arguments,
|
|
as the "-z" argument can specify a registered tap. */
|
|
|
|
/* we register the plugin taps before the other taps because
|
|
stats_tree taps plugins will be registered as tap listeners
|
|
by stats_tree_stat.c and need to registered before that */
|
|
#ifdef HAVE_PLUGINS
|
|
register_all_plugin_tap_listeners();
|
|
#endif
|
|
register_all_tap_listeners();
|
|
|
|
/* Now register the preferences for any non-dissector modules.
|
|
We must do that before we read the preferences as well. */
|
|
prefs_register_modules();
|
|
|
|
/* If invoked with the "-G" flag, we dump out information based on
|
|
the argument to the "-G" flag; if no argument is specified,
|
|
for backwards compatibility we dump out a glossary of display
|
|
filter symbols.
|
|
|
|
XXX - we do this here, for now, to support "-G" with no arguments.
|
|
If none of our build or other processes uses "-G" with no arguments,
|
|
we can just process it with the other arguments. */
|
|
if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
|
|
if (argc == 2)
|
|
proto_registrar_dump_fields(1);
|
|
else {
|
|
if (strcmp(argv[2], "fields") == 0)
|
|
proto_registrar_dump_fields(1);
|
|
else if (strcmp(argv[2], "fields2") == 0)
|
|
proto_registrar_dump_fields(2);
|
|
else if (strcmp(argv[2], "fields3") == 0)
|
|
proto_registrar_dump_fields(3);
|
|
else if (strcmp(argv[2], "protocols") == 0)
|
|
proto_registrar_dump_protocols();
|
|
else if (strcmp(argv[2], "values") == 0)
|
|
proto_registrar_dump_values();
|
|
else if (strcmp(argv[2], "decodes") == 0)
|
|
dissector_dump_decodes();
|
|
else if (strcmp(argv[2], "defaultprefs") == 0)
|
|
write_prefs(NULL);
|
|
else if (strcmp(argv[2], "currentprefs") == 0) {
|
|
read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
|
|
&pf_open_errno, &pf_read_errno, &pf_path);
|
|
write_prefs(NULL);
|
|
} else {
|
|
cmdarg_err("Invalid \"%s\" option for -G flag", argv[2]);
|
|
exit(1);
|
|
}
|
|
}
|
|
exit(0);
|
|
}
|
|
|
|
/* Set the C-language locale to the native environment. */
|
|
setlocale(LC_ALL, "");
|
|
|
|
prefs = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
|
|
&pf_open_errno, &pf_read_errno, &pf_path);
|
|
if (gpf_path != NULL) {
|
|
if (gpf_open_errno != 0) {
|
|
cmdarg_err("Can't open global preferences file \"%s\": %s.",
|
|
pf_path, strerror(gpf_open_errno));
|
|
}
|
|
if (gpf_read_errno != 0) {
|
|
cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
|
|
pf_path, strerror(gpf_read_errno));
|
|
}
|
|
}
|
|
if (pf_path != NULL) {
|
|
if (pf_open_errno != 0) {
|
|
cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
|
|
strerror(pf_open_errno));
|
|
}
|
|
if (pf_read_errno != 0) {
|
|
cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
|
|
pf_path, strerror(pf_read_errno));
|
|
}
|
|
g_free(pf_path);
|
|
pf_path = NULL;
|
|
}
|
|
|
|
/* Set the name resolution code's flags from the preferences. */
|
|
g_resolv_flags = prefs->name_resolve;
|
|
|
|
/* Read the disabled protocols file. */
|
|
read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
|
|
&dp_path, &dp_open_errno, &dp_read_errno);
|
|
if (gdp_path != NULL) {
|
|
if (gdp_open_errno != 0) {
|
|
cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
|
|
gdp_path, strerror(gdp_open_errno));
|
|
}
|
|
if (gdp_read_errno != 0) {
|
|
cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
|
|
gdp_path, strerror(gdp_read_errno));
|
|
}
|
|
g_free(gdp_path);
|
|
}
|
|
if (dp_path != NULL) {
|
|
if (dp_open_errno != 0) {
|
|
cmdarg_err(
|
|
"Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
|
|
strerror(dp_open_errno));
|
|
}
|
|
if (dp_read_errno != 0) {
|
|
cmdarg_err(
|
|
"I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
|
|
strerror(dp_read_errno));
|
|
}
|
|
g_free(dp_path);
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
/* Load Wpcap, if possible */
|
|
load_wpcap();
|
|
#endif
|
|
|
|
init_cap_file(&cfile);
|
|
|
|
/* Assemble the compile-time version information string */
|
|
comp_info_str = g_string_new("Compiled ");
|
|
get_compiled_version_info(comp_info_str);
|
|
|
|
/* Assemble the run-time version information string */
|
|
runtime_info_str = g_string_new("Running ");
|
|
get_runtime_version_info(runtime_info_str);
|
|
|
|
/* Print format defaults to this. */
|
|
print_format = PR_FMT_TEXT;
|
|
|
|
/* Now get our args */
|
|
while ((opt = getopt(argc, argv, optstring)) != -1) {
|
|
switch (opt) {
|
|
case 'a': /* autostop criteria */
|
|
case 'b': /* Ringbuffer option */
|
|
case 'c': /* Capture xxx packets */
|
|
case 'f': /* capture filter */
|
|
case 'i': /* Use interface xxx */
|
|
case 'p': /* Don't capture in promiscuous mode */
|
|
case 's': /* Set the snapshot (capture) length */
|
|
case 'w': /* Write to capture file xxx */
|
|
case 'y': /* Set the pcap data link type */
|
|
#ifdef _WIN32
|
|
case 'B': /* Buffer size */
|
|
#endif /* _WIN32 */
|
|
#ifdef HAVE_LIBPCAP
|
|
status = capture_opts_add_opt(&capture_opts, opt, optarg, &start_capture);
|
|
if(status != 0) {
|
|
exit(status);
|
|
}
|
|
#else
|
|
capture_option_specified = TRUE;
|
|
arg_error = TRUE;
|
|
#endif
|
|
break;
|
|
case 'd': /* Decode as rule */
|
|
if (!add_decode_as(optarg))
|
|
exit(1);
|
|
break;
|
|
case 'D': /* Print a list of capture devices and exit */
|
|
#ifdef HAVE_LIBPCAP
|
|
status = capture_opts_list_interfaces();
|
|
exit(status);
|
|
#else
|
|
capture_option_specified = TRUE;
|
|
arg_error = TRUE;
|
|
#endif
|
|
break;
|
|
case 'F':
|
|
out_file_type = wtap_short_string_to_file_type(optarg);
|
|
if (out_file_type < 0) {
|
|
cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
|
|
list_capture_types();
|
|
exit(1);
|
|
}
|
|
break;
|
|
case 'h': /* Print help and exit */
|
|
print_usage(TRUE);
|
|
exit(0);
|
|
break;
|
|
case 'l': /* "Line-buffer" standard output */
|
|
/* This isn't line-buffering, strictly speaking, it's just
|
|
flushing the standard output after the information for
|
|
each packet is printed; however, that should be good
|
|
enough for all the purposes to which "-l" is put (and
|
|
is probably actually better for "-V", as it does fewer
|
|
writes).
|
|
|
|
See the comment in "process_packet()" for an explanation of
|
|
why we do that, and why we don't just use "setvbuf()" to
|
|
make the standard output line-buffered (short version: in
|
|
Windows, "line-buffered" is the same as "fully-buffered",
|
|
and the output buffer is only flushed when it fills up). */
|
|
line_buffered = TRUE;
|
|
break;
|
|
case 'L': /* Print list of link-layer types and exit */
|
|
#ifdef HAVE_LIBPCAP
|
|
list_link_layer_types = TRUE;
|
|
break;
|
|
#else
|
|
capture_option_specified = TRUE;
|
|
arg_error = TRUE;
|
|
#endif
|
|
break;
|
|
case 'n': /* No name resolution */
|
|
g_resolv_flags = RESOLV_NONE;
|
|
break;
|
|
case 'N': /* Select what types of addresses/port #s to resolve */
|
|
if (g_resolv_flags == RESOLV_ALL)
|
|
g_resolv_flags = RESOLV_NONE;
|
|
badopt = string_to_name_resolve(optarg, &g_resolv_flags);
|
|
if (badopt != '\0') {
|
|
cmdarg_err("-N specifies unknown resolving option '%c'; valid options are 'm', 'n', and 't'",
|
|
badopt);
|
|
exit(1);
|
|
}
|
|
break;
|
|
case 'o': /* Override preference from command line */
|
|
switch (prefs_set_pref(optarg)) {
|
|
|
|
case PREFS_SET_SYNTAX_ERR:
|
|
cmdarg_err("Invalid -o flag \"%s\"", optarg);
|
|
exit(1);
|
|
break;
|
|
|
|
case PREFS_SET_NO_SUCH_PREF:
|
|
case PREFS_SET_OBSOLETE:
|
|
cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
|
|
exit(1);
|
|
break;
|
|
}
|
|
break;
|
|
case 'q': /* Quiet */
|
|
quiet = TRUE;
|
|
break;
|
|
case 'r': /* Read capture file xxx */
|
|
cf_name = g_strdup(optarg);
|
|
break;
|
|
case 'R': /* Read file filter */
|
|
rfilter = optarg;
|
|
break;
|
|
case 'S': /* show packets in real time */
|
|
print_packet_info = TRUE;
|
|
break;
|
|
case 't': /* Time stamp type */
|
|
if (strcmp(optarg, "r") == 0)
|
|
timestamp_set_type(TS_RELATIVE);
|
|
else if (strcmp(optarg, "a") == 0)
|
|
timestamp_set_type(TS_ABSOLUTE);
|
|
else if (strcmp(optarg, "ad") == 0)
|
|
timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
|
|
else if (strcmp(optarg, "d") == 0)
|
|
timestamp_set_type(TS_DELTA);
|
|
else {
|
|
cmdarg_err("Invalid time stamp type \"%s\"",
|
|
optarg);
|
|
cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
|
|
cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
|
|
exit(1);
|
|
}
|
|
break;
|
|
case 'T': /* printing Type */
|
|
if (strcmp(optarg, "text") == 0) {
|
|
output_action = WRITE_TEXT;
|
|
print_format = PR_FMT_TEXT;
|
|
} else if (strcmp(optarg, "ps") == 0) {
|
|
output_action = WRITE_TEXT;
|
|
print_format = PR_FMT_PS;
|
|
} else if (strcmp(optarg, "pdml") == 0) {
|
|
output_action = WRITE_XML;
|
|
verbose = TRUE;
|
|
} else if (strcmp(optarg, "psml") == 0) {
|
|
output_action = WRITE_XML;
|
|
verbose = FALSE;
|
|
} else {
|
|
cmdarg_err("Invalid -T parameter.");
|
|
cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", or \"psml\".");
|
|
exit(1);
|
|
}
|
|
break;
|
|
case 'v': /* Show version and exit */
|
|
printf("TShark " VERSION "%s\n"
|
|
"\n"
|
|
"%s"
|
|
"\n"
|
|
"%s"
|
|
"\n"
|
|
"%s",
|
|
svnversion, get_copyright_info(), comp_info_str->str,
|
|
runtime_info_str->str);
|
|
exit(0);
|
|
break;
|
|
case 'V': /* Verbose */
|
|
verbose = TRUE;
|
|
break;
|
|
case 'x': /* Print packet data in hex (and ASCII) */
|
|
print_hex = TRUE;
|
|
break;
|
|
case 'X':
|
|
ex_opt_add(optarg);
|
|
break;
|
|
case 'z':
|
|
/* We won't call the init function for the stat this soon
|
|
as it would disallow MATE's fields (which are registered
|
|
by the preferences set callback) from being used as
|
|
part of a tap filter. Instead, we just add the argument
|
|
to a list of stat arguments. */
|
|
if (!process_stat_cmd_arg(optarg)) {
|
|
cmdarg_err("invalid -z argument.");
|
|
cmdarg_err_cont(" -z argument must be one of :");
|
|
list_stat_cmd_args();
|
|
exit(1);
|
|
}
|
|
break;
|
|
default:
|
|
case '?': /* Bad flag - print usage message */
|
|
switch(optopt) {
|
|
case 'F':
|
|
list_capture_types();
|
|
break;
|
|
default:
|
|
print_usage(TRUE);
|
|
}
|
|
exit(1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If no capture filter or read filter has been specified, and there are
|
|
still command-line arguments, treat them as the tokens of a capture
|
|
filter (if no "-r" flag was specified) or a read filter (if a "-r"
|
|
flag was specified. */
|
|
if (optind < argc) {
|
|
if (cf_name != NULL) {
|
|
if (rfilter != NULL) {
|
|
cmdarg_err("Read filters were specified both with \"-R\" "
|
|
"and with additional command-line arguments");
|
|
exit(1);
|
|
}
|
|
rfilter = get_args_as_string(argc, argv, optind);
|
|
} else {
|
|
#ifdef HAVE_LIBPCAP
|
|
if (capture_opts.has_cfilter) {
|
|
cmdarg_err("Capture filters were specified both with \"-f\""
|
|
" and with additional command-line arguments");
|
|
exit(1);
|
|
}
|
|
capture_opts.has_cfilter = TRUE;
|
|
capture_opts.cfilter = get_args_as_string(argc, argv, optind);
|
|
#else
|
|
capture_option_specified = TRUE;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
if (!capture_opts.saving_to_file) {
|
|
/* We're not saving the capture to a file; if "-q" wasn't specified,
|
|
we should print packet information */
|
|
if (!quiet)
|
|
print_packet_info = TRUE;
|
|
} else {
|
|
/* We're saving to a file; if we're writing to the standard output.
|
|
and we'll also be writing dissected packets to the standard
|
|
output, reject the request. At best, we could redirect that
|
|
to the standard error; we *can't* write both to the standard
|
|
output and have either of them be useful. */
|
|
if (strcmp(capture_opts.save_file, "-") == 0 && print_packet_info) {
|
|
cmdarg_err("You can't write both raw packet data and dissected packets"
|
|
" to the standard output.");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
#ifndef HAVE_LIBPCAP
|
|
if (capture_option_specified)
|
|
cmdarg_err("This version of TShark was not built with support for capturing packets.");
|
|
#endif
|
|
if (arg_error) {
|
|
print_usage(FALSE);
|
|
exit(1);
|
|
}
|
|
|
|
/* We don't support capture filters when reading from a capture file
|
|
(the BPF compiler doesn't support all link-layer types that we
|
|
support in capture files we read). */
|
|
#ifdef HAVE_LIBPCAP
|
|
if (cf_name != NULL) {
|
|
if (capture_opts.has_cfilter) {
|
|
cmdarg_err("Only read filters, not capture filters, "
|
|
"can be specified when reading a capture file.");
|
|
exit(1);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (print_hex) {
|
|
if (output_action != WRITE_TEXT) {
|
|
cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_LIBPCAP
|
|
if (list_link_layer_types) {
|
|
/* We're supposed to list the link-layer types for an interface;
|
|
did the user also specify a capture file to be read? */
|
|
if (cf_name) {
|
|
/* Yes - that's bogus. */
|
|
cmdarg_err("You can't specify -L and a capture file to be read.");
|
|
exit(1);
|
|
}
|
|
/* No - did they specify a ring buffer option? */
|
|
if (capture_opts.multi_files_on) {
|
|
cmdarg_err("Ring buffer requested, but a capture isn't being done.");
|
|
exit(1);
|
|
}
|
|
} else {
|
|
/* If they didn't specify a "-w" flag, but specified a maximum capture
|
|
file size, tell them that this doesn't work, and exit. */
|
|
if (capture_opts.has_autostop_filesize && capture_opts.save_file == NULL) {
|
|
cmdarg_err("Maximum capture file size specified, but "
|
|
"capture isn't being saved to a file.");
|
|
exit(1);
|
|
}
|
|
|
|
if (cf_name) {
|
|
/*
|
|
* "-r" was specified, so we're reading a capture file.
|
|
* Capture options don't apply here.
|
|
*/
|
|
if (capture_opts.multi_files_on) {
|
|
cmdarg_err("Multiple capture files requested, but "
|
|
"a capture isn't being done.");
|
|
exit(1);
|
|
}
|
|
if (capture_opts.has_file_duration) {
|
|
cmdarg_err("Switching capture files after a time interval was specified, but "
|
|
"a capture isn't being done.");
|
|
exit(1);
|
|
}
|
|
if (capture_opts.has_ring_num_files) {
|
|
cmdarg_err("A ring buffer of capture files was specified, but "
|
|
"a capture isn't being done.");
|
|
exit(1);
|
|
}
|
|
if (capture_opts.has_autostop_files) {
|
|
cmdarg_err("A maximum number of capture files was specified, but "
|
|
"a capture isn't being done.");
|
|
exit(1);
|
|
}
|
|
if (capture_opts.has_autostop_packets) {
|
|
cmdarg_err("A maximum number of captured packets was specified, but "
|
|
"a capture isn't being done.");
|
|
exit(1);
|
|
}
|
|
if (capture_opts.has_autostop_filesize) {
|
|
cmdarg_err("A maximum capture file size was specified, but "
|
|
"a capture isn't being done.");
|
|
exit(1);
|
|
}
|
|
if (capture_opts.has_autostop_duration) {
|
|
cmdarg_err("A maximum capture time was specified, but "
|
|
"a capture isn't being done.");
|
|
exit(1);
|
|
}
|
|
} else {
|
|
/*
|
|
* "-r" wasn't specified, so we're doing a live capture.
|
|
*/
|
|
if (capture_opts.saving_to_file) {
|
|
/* They specified a "-w" flag, so we'll be saving to a capture file. */
|
|
|
|
/* When capturing, we only support writing libpcap format. */
|
|
if (out_file_type != WTAP_FILE_PCAP) {
|
|
cmdarg_err("Live captures can only be saved in libpcap format.");
|
|
exit(1);
|
|
}
|
|
if (capture_opts.multi_files_on) {
|
|
/* Multiple-file mode works only under certain conditions:
|
|
a) it doesn't work if you're writing to the standard output;
|
|
b) it doesn't work if you're writing to a pipe;
|
|
c) it makes no sense if the maximum file size is set to "infinite"
|
|
(XXX - shouldn't that be "if there is no stop criterion",
|
|
as you might want to switch files based on a packet count
|
|
or a time). */
|
|
if (strcmp(capture_opts.save_file, "-") == 0) {
|
|
cmdarg_err("Multiple capture files requested, but "
|
|
"the capture is being written to the standard output.");
|
|
exit(1);
|
|
}
|
|
if (capture_opts.output_to_pipe) {
|
|
cmdarg_err("Multiple capture files requested, but "
|
|
"the capture file is a pipe.");
|
|
exit(1);
|
|
}
|
|
if (!capture_opts.has_autostop_filesize) {
|
|
cmdarg_err("Multiple capture files requested, but "
|
|
"no maximum capture file size was specified.");
|
|
exit(1);
|
|
}
|
|
}
|
|
} else {
|
|
/* They didn't specify a "-w" flag, so we won't be saving to a
|
|
capture file. Check for options that only make sense if
|
|
we're saving to a file. */
|
|
if (capture_opts.has_autostop_filesize) {
|
|
cmdarg_err("Maximum capture file size specified, but "
|
|
"capture isn't being saved to a file.");
|
|
exit(1);
|
|
}
|
|
if (capture_opts.multi_files_on) {
|
|
cmdarg_err("Multiple capture files requested, but "
|
|
"the capture isn't being saved to a file.");
|
|
exit(1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
/* Start windows sockets */
|
|
WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
|
|
#endif /* _WIN32 */
|
|
|
|
/* Notify all registered modules that have had any of their preferences
|
|
changed either from one of the preferences file or from the command
|
|
line that their preferences have changed. */
|
|
prefs_apply_all();
|
|
|
|
/* At this point MATE will have registered its field array so we can
|
|
have a tap filter with one of MATE's late-registered fields as part
|
|
of the filter. We can now process all the "-z" arguments. */
|
|
start_requested_stats();
|
|
|
|
/* disabled protocols as per configuration file */
|
|
if (gdp_path == NULL && dp_path == NULL) {
|
|
set_disabled_protos_list();
|
|
}
|
|
|
|
/* Build the column format array */
|
|
col_setup(&cfile.cinfo, prefs->num_cols);
|
|
for (i = 0; i < cfile.cinfo.num_cols; i++) {
|
|
cfile.cinfo.col_fmt[i] = get_column_format(i);
|
|
cfile.cinfo.col_title[i] = g_strdup(get_column_title(i));
|
|
cfile.cinfo.fmt_matx[i] = (gboolean *) g_malloc0(sizeof(gboolean) *
|
|
NUM_COL_FMTS);
|
|
get_column_format_matches(cfile.cinfo.fmt_matx[i], cfile.cinfo.col_fmt[i]);
|
|
cfile.cinfo.col_data[i] = NULL;
|
|
if (cfile.cinfo.col_fmt[i] == COL_INFO)
|
|
cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_INFO_LEN);
|
|
else
|
|
cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
|
|
cfile.cinfo.col_fence[i] = 0;
|
|
cfile.cinfo.col_expr[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
|
|
cfile.cinfo.col_expr_val[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
|
|
}
|
|
|
|
for (i = 0; i < cfile.cinfo.num_cols; i++) {
|
|
int j;
|
|
|
|
for (j = 0; j < NUM_COL_FMTS; j++) {
|
|
if (!cfile.cinfo.fmt_matx[i][j])
|
|
continue;
|
|
|
|
if (cfile.cinfo.col_first[j] == -1)
|
|
cfile.cinfo.col_first[j] = i;
|
|
cfile.cinfo.col_last[j] = i;
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_LIBPCAP
|
|
capture_opts_trim_snaplen(&capture_opts, MIN_PACKET_SIZE);
|
|
capture_opts_trim_ring_num_files(&capture_opts);
|
|
#endif
|
|
|
|
if (rfilter != NULL) {
|
|
if (!dfilter_compile(rfilter, &rfcode)) {
|
|
cmdarg_err("%s", dfilter_error_msg);
|
|
epan_cleanup();
|
|
#ifdef HAVE_PCAP_OPEN_DEAD
|
|
{
|
|
pcap_t *pc;
|
|
|
|
pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
|
|
if (pc != NULL) {
|
|
if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
|
|
cmdarg_err_cont(
|
|
" Note: That display filter code looks like a valid capture filter;");
|
|
cmdarg_err_cont(
|
|
" maybe you mixed them up?");
|
|
}
|
|
pcap_close(pc);
|
|
}
|
|
}
|
|
#endif
|
|
exit(2);
|
|
}
|
|
}
|
|
cfile.rfcode = rfcode;
|
|
|
|
if (print_packet_info) {
|
|
/* If we're printing as text or PostScript, we have
|
|
to create a print stream. */
|
|
if (output_action == WRITE_TEXT) {
|
|
switch (print_format) {
|
|
|
|
case PR_FMT_TEXT:
|
|
print_stream = print_stream_text_stdio_new(stdout);
|
|
break;
|
|
|
|
case PR_FMT_PS:
|
|
print_stream = print_stream_ps_stdio_new(stdout);
|
|
break;
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
}
|
|
|
|
/* We have to dissect each packet if:
|
|
|
|
we're printing information about each packet;
|
|
|
|
we're using a read filter on the packets;
|
|
|
|
we're using any taps. */
|
|
do_dissection = print_packet_info || rfcode || have_tap_listeners();
|
|
|
|
if (cf_name) {
|
|
/*
|
|
* We're reading a capture file.
|
|
*/
|
|
|
|
/*
|
|
* Immediately relinquish any special privileges we have; we must not
|
|
* be allowed to read any capture files the user running TShark
|
|
* can't open.
|
|
*/
|
|
relinquish_special_privs_perm();
|
|
|
|
if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
|
|
epan_cleanup();
|
|
exit(2);
|
|
}
|
|
|
|
/* Set timestamp precision; there should arguably be a command-line
|
|
option to let the user set this. */
|
|
switch(wtap_file_tsprecision(cfile.wth)) {
|
|
case(WTAP_FILE_TSPREC_SEC):
|
|
timestamp_set_precision(TS_PREC_AUTO_SEC);
|
|
break;
|
|
case(WTAP_FILE_TSPREC_DSEC):
|
|
timestamp_set_precision(TS_PREC_AUTO_DSEC);
|
|
break;
|
|
case(WTAP_FILE_TSPREC_CSEC):
|
|
timestamp_set_precision(TS_PREC_AUTO_CSEC);
|
|
break;
|
|
case(WTAP_FILE_TSPREC_MSEC):
|
|
timestamp_set_precision(TS_PREC_AUTO_MSEC);
|
|
break;
|
|
case(WTAP_FILE_TSPREC_USEC):
|
|
timestamp_set_precision(TS_PREC_AUTO_USEC);
|
|
break;
|
|
case(WTAP_FILE_TSPREC_NSEC):
|
|
timestamp_set_precision(TS_PREC_AUTO_NSEC);
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
/* Process the packets in the file */
|
|
err = load_cap_file(&cfile, capture_opts.save_file, out_file_type);
|
|
if (err != 0) {
|
|
epan_cleanup();
|
|
exit(2);
|
|
}
|
|
cf_name[0] = '\0';
|
|
} else {
|
|
/* No capture file specified, so we're supposed to do a live capture
|
|
(or get a list of link-layer types for a live capture device);
|
|
do we have support for live captures? */
|
|
#ifdef HAVE_LIBPCAP
|
|
|
|
#ifdef _WIN32
|
|
if (!has_wpcap) {
|
|
char *detailed_err;
|
|
|
|
cmdarg_err("WinPcap couldn't be found.");
|
|
detailed_err = cant_load_winpcap_err("TShark");
|
|
cmdarg_err_cont("%s", detailed_err);
|
|
g_free(detailed_err);
|
|
exit(2);
|
|
}
|
|
#endif
|
|
|
|
/* trim the interface name and exit if that failed */
|
|
if (!capture_opts_trim_iface(&capture_opts,
|
|
(prefs->capture_device) ? get_if_name(prefs->capture_device) : NULL)) {
|
|
exit(2);
|
|
}
|
|
|
|
/* if requested, list the link layer types and exit */
|
|
if (list_link_layer_types) {
|
|
status = capture_opts_list_link_layer_types(&capture_opts);
|
|
exit(status);
|
|
}
|
|
|
|
if (!print_packet_info && !quiet) {
|
|
/*
|
|
* We're not printing information for each packet, and the user
|
|
* didn't ask us not to print a count of packets as they arrive,
|
|
* so print that count so the user knows that packets are arriving.
|
|
*
|
|
* XXX - what if the user wants to do a live capture, doesn't want
|
|
* to save it to a file, doesn't want information printed for each
|
|
* packet, does want some "-z" statistic, and wants packet counts
|
|
* so they know whether they're seeing any packets?
|
|
*/
|
|
print_packet_counts = TRUE;
|
|
}
|
|
|
|
/* For now, assume libpcap gives microsecond precision. */
|
|
timestamp_set_precision(TS_PREC_AUTO_USEC);
|
|
|
|
capture();
|
|
|
|
if (capture_opts.multi_files_on) {
|
|
ringbuf_free();
|
|
}
|
|
#else
|
|
/* No - complain. */
|
|
cmdarg_err("This version of TShark was not built with support for capturing packets.");
|
|
exit(2);
|
|
#endif
|
|
}
|
|
|
|
draw_tap_listeners(TRUE);
|
|
funnel_dump_all_text_windows();
|
|
epan_cleanup();
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef HAVE_LIBPCAP
|
|
/* Do the low-level work of a capture.
|
|
Returns TRUE if it succeeds, FALSE otherwise. */
|
|
|
|
static condition *volatile cnd_file_duration = NULL; /* this must be visible in process_packet */
|
|
|
|
static int
|
|
capture(void)
|
|
{
|
|
int err = 0;
|
|
int volatile volatile_err = 0;
|
|
int volatile inpkts = 0;
|
|
int pcap_cnt;
|
|
condition *volatile cnd_autostop_size = NULL;
|
|
condition *volatile cnd_autostop_duration = NULL;
|
|
char *descr;
|
|
#ifndef _WIN32
|
|
void (*oldhandler)(int);
|
|
guchar pcap_data[WTAP_MAX_PACKET_SIZE];
|
|
#endif
|
|
struct pcap_stat stats;
|
|
gboolean write_ok;
|
|
gboolean close_ok;
|
|
gboolean cfilter_error = FALSE;
|
|
char errmsg[1024+1];
|
|
char secondary_errmsg[4096+1];
|
|
int save_file_fd;
|
|
|
|
/* Initialize all data structures used for dissection. */
|
|
init_dissection();
|
|
|
|
ld.wtap_linktype = WTAP_ENCAP_UNKNOWN;
|
|
ld.pdh = NULL;
|
|
ld.packet_cb = capture_pcap_cb;
|
|
|
|
|
|
/* open the "input file" from network interface or capture pipe */
|
|
if (!capture_loop_open_input(&capture_opts, &ld, errmsg, sizeof(errmsg),
|
|
secondary_errmsg, sizeof(secondary_errmsg))) {
|
|
goto error;
|
|
}
|
|
|
|
/*
|
|
* We've opened the capture device, so we shouldn't need any special
|
|
* privileges any more; relinquish those privileges.
|
|
*
|
|
* XXX - if we have saved set-user-ID support, we should give up those
|
|
* privileges immediately, and then reclaim them long enough to get
|
|
* a list of network interfaces and to open one, and then give them
|
|
* up again, so that stuff we do while processing the argument list,
|
|
* reading the user's preferences, loading and starting plugins
|
|
* (especially *user* plugins), etc. is done with the user's privileges,
|
|
* not special privileges.
|
|
*/
|
|
relinquish_special_privs_perm();
|
|
|
|
/* init the input filter from the network interface (capture pipe will do nothing) */
|
|
switch (capture_loop_init_filter(ld.pcap_h, ld.from_cap_pipe, capture_opts.iface, capture_opts.cfilter)) {
|
|
|
|
case INITFILTER_NO_ERROR:
|
|
break;
|
|
|
|
case INITFILTER_BAD_FILTER:
|
|
cfilter_error = TRUE;
|
|
g_snprintf(errmsg, sizeof(errmsg), "%s", pcap_geterr(ld.pcap_h));
|
|
*secondary_errmsg = '\0';
|
|
goto error;
|
|
|
|
case INITFILTER_OTHER_ERROR:
|
|
g_snprintf(errmsg, sizeof(errmsg), "Can't install filter (%s).",
|
|
pcap_geterr(ld.pcap_h));
|
|
g_snprintf(secondary_errmsg, sizeof(secondary_errmsg), "%s", please_report);
|
|
goto error;
|
|
}
|
|
|
|
if (capture_opts.saving_to_file) {
|
|
/* open the output file (temporary/specified name/ringbuffer/named pipe/stdout) */
|
|
if (!capture_loop_open_output(&capture_opts, &save_file_fd, errmsg, sizeof(errmsg))) {
|
|
*secondary_errmsg = '\0';
|
|
goto error;
|
|
}
|
|
|
|
/* set up to write to the already-opened capture output file/files */
|
|
if(!capture_loop_init_output(&capture_opts, save_file_fd, &ld, errmsg, sizeof errmsg)) {
|
|
*secondary_errmsg = '\0';
|
|
goto error;
|
|
}
|
|
|
|
/* Save the capture file name. */
|
|
ld.save_file = capture_opts.save_file;
|
|
}
|
|
|
|
ld.wtap_linktype = wtap_pcap_encap_to_wtap_encap(ld.linktype);
|
|
|
|
#ifdef _WIN32
|
|
/* Catch a CTRL+C event and, if we get it, clean up and exit. */
|
|
SetConsoleCtrlHandler(capture_cleanup, TRUE);
|
|
#else /* _WIN32 */
|
|
/* Catch SIGINT and SIGTERM and, if we get either of them, clean up
|
|
and exit.
|
|
XXX - deal with signal semantics on various UNIX platforms. Or just
|
|
use "sigaction()" and be done with it? */
|
|
signal(SIGTERM, capture_cleanup);
|
|
signal(SIGINT, capture_cleanup);
|
|
if ((oldhandler = signal(SIGHUP, capture_cleanup)) != SIG_DFL)
|
|
signal(SIGHUP, oldhandler);
|
|
|
|
#ifdef SIGINFO
|
|
/* Catch SIGINFO and, if we get it and we're capturing to a file in
|
|
quiet mode, report the number of packets we've captured. */
|
|
signal(SIGINFO, report_counts_siginfo);
|
|
#endif /* SIGINFO */
|
|
#endif /* _WIN32 */
|
|
|
|
/* Let the user know what interface was chosen. */
|
|
descr = get_interface_descriptive_name(capture_opts.iface);
|
|
fprintf(stderr, "Capturing on %s\n", descr);
|
|
g_free(descr);
|
|
|
|
/* initialize capture stop conditions */
|
|
init_capture_stop_conditions();
|
|
/* create stop conditions */
|
|
if (capture_opts.has_autostop_filesize)
|
|
cnd_autostop_size = cnd_new((const char*)CND_CLASS_CAPTURESIZE,
|
|
(long)capture_opts.autostop_filesize * 1024);
|
|
if (capture_opts.has_autostop_duration)
|
|
cnd_autostop_duration = cnd_new((const char*)CND_CLASS_TIMEOUT,
|
|
(gint32)capture_opts.autostop_duration);
|
|
|
|
if (capture_opts.multi_files_on && capture_opts.has_file_duration)
|
|
cnd_file_duration = cnd_new(CND_CLASS_TIMEOUT, capture_opts.file_duration);
|
|
|
|
if (!setjmp(ld.stopenv)) {
|
|
ld.go = TRUE;
|
|
ld.packet_count = 0;
|
|
} else
|
|
ld.go = FALSE;
|
|
|
|
while (ld.go) {
|
|
/* We need to be careful with automatic variables defined in the
|
|
outer scope which are changed inside the loop. Most compilers
|
|
don't try to roll them back to their original values after the
|
|
longjmp which causes the loop to finish, but all that the
|
|
standards say is that their values are indeterminate. If we
|
|
don't want them to be rolled back, we should define them with the
|
|
volatile attribute (paraphrasing W. Richard Stevens, Advanced
|
|
Programming in the UNIX Environment, p. 178).
|
|
|
|
The "err" variable causes a particular problem. If we give it
|
|
the volatile attribute, then when we pass a reference to it (as
|
|
in "&err") to a function, GCC warns: "passing arg <n> of
|
|
<function> discards qualifiers from pointer target type".
|
|
Therefore within the loop and just beyond we don't use "err".
|
|
Within the loop we define "loop_err", and assign its value to
|
|
"volatile_err", which is in the outer scope and is checked when
|
|
the loop finishes.
|
|
|
|
We also define "packet_count_prev" here to keep things tidy,
|
|
since it's used only inside the loop. If it were defined in the
|
|
outer scope, GCC would give a warning (unnecessary in this case)
|
|
that it might be clobbered, and we'd need to give it the volatile
|
|
attribute to suppress the warning. */
|
|
|
|
int loop_err = 0;
|
|
int packet_count_prev = 0;
|
|
|
|
if (cnd_autostop_size == NULL && cnd_autostop_duration == NULL) {
|
|
/* We're not stopping at a particular capture file size, and we're
|
|
not stopping after some particular amount of time has expired,
|
|
so either we have no stop condition or the only stop condition
|
|
is a maximum packet count.
|
|
|
|
If there's no maximum packet count, pass it -1, meaning "until
|
|
you run out of packets in the bufferful you read". Otherwise,
|
|
pass it the number of packets we have left to capture.
|
|
|
|
We don't call "pcap_loop()" as, if we're saving to a file that's
|
|
a FIFO, we want to flush the FIFO after we're done processing
|
|
this libpcap bufferful of packets, so that the program
|
|
reading the FIFO sees the packets immediately and doesn't get
|
|
any partial packet, forcing it to block in the middle of reading
|
|
that packet. */
|
|
if (capture_opts.autostop_packets == 0)
|
|
pcap_cnt = -1;
|
|
else {
|
|
if (ld.packet_count >= capture_opts.autostop_packets) {
|
|
/* XXX do we need this test here? */
|
|
/* It appears there's nothing more to capture. */
|
|
break;
|
|
}
|
|
pcap_cnt = capture_opts.autostop_packets - ld.packet_count;
|
|
}
|
|
} else {
|
|
/* We need to check the capture file size or the timeout after
|
|
each packet. */
|
|
pcap_cnt = 1;
|
|
}
|
|
#ifndef _WIN32
|
|
if (ld.from_cap_pipe) {
|
|
inpkts = cap_pipe_dispatch(&ld, pcap_data, errmsg, sizeof errmsg);
|
|
} else
|
|
#endif
|
|
inpkts = pcap_dispatch(ld.pcap_h, pcap_cnt, ld.packet_cb, (u_char *) &ld);
|
|
if (inpkts < 0) {
|
|
/* Error from "pcap_dispatch()", or error or "no more packets" from
|
|
"cap_pipe_dispatch(). */
|
|
ld.go = FALSE;
|
|
} else if (cnd_autostop_duration != NULL && cnd_eval(cnd_autostop_duration)) {
|
|
/* The specified capture time has elapsed; stop the capture. */
|
|
ld.go = FALSE;
|
|
} else if (inpkts > 0) {
|
|
if (capture_opts.autostop_packets != 0 &&
|
|
ld.packet_count >= capture_opts.autostop_packets) {
|
|
/* The specified number of packets have been captured and have
|
|
passed both any capture filter in effect and any read filter
|
|
in effect. */
|
|
ld.go = FALSE;
|
|
} else if (cnd_autostop_size != NULL &&
|
|
cnd_eval(cnd_autostop_size, (guint32)ld.bytes_written)) {
|
|
/* We're saving the capture to a file, and the capture file reached
|
|
its maximum size. */
|
|
if (capture_opts.multi_files_on) {
|
|
/* Switch to the next ringbuffer file */
|
|
if (ringbuf_switch_file(&ld.pdh, &capture_opts.save_file,
|
|
&save_file_fd, &ld.bytes_written,
|
|
&loop_err)) {
|
|
/* File switch succeeded: reset the condition */
|
|
cnd_reset(cnd_autostop_size);
|
|
if (cnd_file_duration) {
|
|
cnd_reset(cnd_file_duration);
|
|
}
|
|
} else {
|
|
/* File switch failed: stop here */
|
|
volatile_err = loop_err;
|
|
ld.go = FALSE;
|
|
}
|
|
} else {
|
|
/* No ringbuffer - just stop. */
|
|
ld.go = FALSE;
|
|
}
|
|
}
|
|
if (capture_opts.output_to_pipe) {
|
|
if (ld.packet_count > packet_count_prev) {
|
|
libpcap_dump_flush(ld.pdh, NULL);
|
|
packet_count_prev = ld.packet_count;
|
|
}
|
|
}
|
|
} /* inpkts > 0 */
|
|
} /* while (ld.go) */
|
|
|
|
/* delete stop conditions */
|
|
if (cnd_autostop_size != NULL)
|
|
cnd_delete(cnd_autostop_size);
|
|
if (cnd_autostop_duration != NULL)
|
|
cnd_delete(cnd_autostop_duration);
|
|
if (cnd_file_duration != NULL)
|
|
cnd_delete(cnd_file_duration);
|
|
|
|
if (print_packet_counts) {
|
|
/* We're printing packet counts to stderr.
|
|
Send a newline so that we move to the line after the packet count. */
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
/* If we got an error while capturing, report it. */
|
|
if (inpkts < 0) {
|
|
#ifndef _WIN32
|
|
if (ld.from_cap_pipe) {
|
|
if (ld.cap_pipe_err == PIPERR) {
|
|
cmdarg_err("Error while capturing packets: %s", errmsg);
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
cmdarg_err("Error while capturing packets: %s", pcap_geterr(ld.pcap_h));
|
|
}
|
|
}
|
|
|
|
if (volatile_err == 0)
|
|
write_ok = TRUE;
|
|
else {
|
|
show_capture_file_io_error(capture_opts.save_file, volatile_err, FALSE);
|
|
write_ok = FALSE;
|
|
}
|
|
|
|
if (capture_opts.save_file != NULL) {
|
|
/* We're saving to a file or files; close all files. */
|
|
close_ok = capture_loop_close_output(&capture_opts, &ld, &err);
|
|
|
|
/* If we've displayed a message about a write error, there's no point
|
|
in displaying another message about an error on close. */
|
|
if (!close_ok && write_ok)
|
|
show_capture_file_io_error(capture_opts.save_file, err, TRUE);
|
|
}
|
|
|
|
#ifndef _WIN32
|
|
if (ld.from_cap_pipe && ld.cap_pipe_fd >= 0)
|
|
eth_close(ld.cap_pipe_fd);
|
|
else
|
|
#endif
|
|
{
|
|
/* Get the capture statistics, and, if any packets were dropped, report
|
|
that. */
|
|
if (pcap_stats(ld.pcap_h, &stats) >= 0) {
|
|
if (stats.ps_drop != 0) {
|
|
fprintf(stderr, "%u packets dropped\n", stats.ps_drop);
|
|
}
|
|
} else {
|
|
cmdarg_err("Can't get packet-drop statistics: %s", pcap_geterr(ld.pcap_h));
|
|
}
|
|
pcap_close(ld.pcap_h);
|
|
}
|
|
|
|
/* Report the number of captured packets if not reported during capture
|
|
and we are saving to a file. */
|
|
report_counts();
|
|
|
|
return TRUE;
|
|
|
|
error:
|
|
if (capture_opts.multi_files_on) {
|
|
ringbuf_error_cleanup();
|
|
}
|
|
g_free(capture_opts.save_file);
|
|
capture_opts.save_file = NULL;
|
|
if (cfilter_error) {
|
|
dfilter_t *rfcode = NULL;
|
|
if (dfilter_compile(capture_opts.cfilter, &rfcode) && rfcode != NULL) {
|
|
cmdarg_err(
|
|
"Invalid capture filter: \"%s\"!\n"
|
|
"\n"
|
|
"That string looks like a valid display filter; however, it isn't a valid\n"
|
|
"capture filter (%s).\n"
|
|
"\n"
|
|
"Note that display filters and capture filters don't have the same syntax,\n"
|
|
"so you can't use most display filter expressions as capture filters.\n"
|
|
"\n"
|
|
"See the User's Guide for a description of the capture filter syntax.",
|
|
capture_opts.cfilter, errmsg);
|
|
dfilter_free(rfcode);
|
|
} else {
|
|
cmdarg_err(
|
|
"Invalid capture filter: \"%s\"!\n"
|
|
"\n"
|
|
"That string isn't a valid capture filter (%s).\n"
|
|
"See the User's Guide for a description of the capture filter syntax.",
|
|
capture_opts.cfilter, errmsg);
|
|
}
|
|
} else {
|
|
cmdarg_err("%s", errmsg);
|
|
if (*secondary_errmsg != '\0') {
|
|
fprintf(stderr, "\n");
|
|
cmdarg_err_cont("%s", secondary_errmsg);
|
|
}
|
|
}
|
|
#ifndef _WIN32
|
|
if (ld.from_cap_pipe) {
|
|
if (ld.cap_pipe_fd >= 0)
|
|
eth_close(ld.cap_pipe_fd);
|
|
} else
|
|
#endif
|
|
{
|
|
if (ld.pcap_h != NULL)
|
|
pcap_close(ld.pcap_h);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
capture_pcap_cb(u_char *user, const struct pcap_pkthdr *phdr,
|
|
const u_char *pd)
|
|
{
|
|
struct wtap_pkthdr whdr;
|
|
union wtap_pseudo_header pseudo_header;
|
|
const guchar *wtap_pd;
|
|
loop_data *ld = (loop_data *) user;
|
|
int loop_err;
|
|
int err;
|
|
int save_file_fd;
|
|
gboolean packet_accepted;
|
|
|
|
#ifdef SIGINFO
|
|
/*
|
|
* Prevent a SIGINFO handler from writing to stdout while we're
|
|
* doing so; instead, have it just set a flag telling us to print
|
|
* that information when we're done.
|
|
*/
|
|
infodelay = TRUE;
|
|
#endif /* SIGINFO */
|
|
|
|
/* The current packet may have arrived after a very long silence,
|
|
* way past the time to switch files. In order not to have
|
|
* the first packet of a new series of events as the last
|
|
* [or only] packet in the file, switch before writing!
|
|
*/
|
|
if (cnd_file_duration != NULL && cnd_eval(cnd_file_duration)) {
|
|
/* time elapsed for this ring file, switch to the next */
|
|
if (ringbuf_switch_file(&ld->pdh, &ld->save_file, &save_file_fd,
|
|
&ld->bytes_written, &loop_err)) {
|
|
/* File switch succeeded: reset the condition */
|
|
cnd_reset(cnd_file_duration);
|
|
} else {
|
|
/* File switch failed: stop here */
|
|
/* XXX - we should do something with "loop_err" */
|
|
ld->go = FALSE;
|
|
}
|
|
}
|
|
|
|
if (do_dissection) {
|
|
/* We're goint to print packet information, run a read filter, or
|
|
process taps. Use process_packet() to handle that; in order
|
|
to do that, we need to convert from libpcap to Wiretap format.
|
|
If that fails, ignore the packet (wtap_process_pcap_packet has
|
|
written an error message). */
|
|
wtap_pd = wtap_process_pcap_packet(ld->wtap_linktype, phdr, pd,
|
|
&pseudo_header, &whdr, &err);
|
|
if (wtap_pd == NULL)
|
|
return;
|
|
|
|
packet_accepted = process_packet(&cfile, 0, &whdr, &pseudo_header, wtap_pd);
|
|
} else {
|
|
/* We're just writing out packets. */
|
|
packet_accepted = TRUE;
|
|
}
|
|
|
|
if (packet_accepted) {
|
|
/* Count this packet. */
|
|
#ifdef HAVE_LIBPCAP
|
|
ld->packet_count++;
|
|
#endif
|
|
|
|
if (ld->pdh != NULL) {
|
|
if (!libpcap_write_packet(ld->pdh, phdr, pd, &ld->bytes_written, &err)) {
|
|
/* Error writing to a capture file */
|
|
if (print_packet_counts) {
|
|
/* We're printing counts of packets captured; move to the line after
|
|
the count. */
|
|
fprintf(stderr, "\n");
|
|
}
|
|
show_capture_file_io_error(ld->save_file, err, FALSE);
|
|
pcap_close(ld->pcap_h);
|
|
libpcap_dump_close(ld->pdh, &err);
|
|
exit(2);
|
|
}
|
|
}
|
|
if (print_packet_counts) {
|
|
/* We're printing packet counts. */
|
|
if (ld->packet_count != 0) {
|
|
fprintf(stderr, "\r%u ", ld->packet_count);
|
|
/* stderr could be line buffered */
|
|
fflush(stderr);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef SIGINFO
|
|
/*
|
|
* Allow SIGINFO handlers to write.
|
|
*/
|
|
infodelay = FALSE;
|
|
|
|
/*
|
|
* If a SIGINFO handler asked us to write out capture counts, do so.
|
|
*/
|
|
if (infoprint)
|
|
report_counts();
|
|
#endif /* SIGINFO */
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
static BOOL WINAPI
|
|
capture_cleanup(DWORD ctrltype _U_)
|
|
{
|
|
/* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
|
|
Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
|
|
is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
|
|
like SIGTERM at least when the machine's shutting down.
|
|
|
|
For now, we handle them all as indications that we should clean up
|
|
and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
|
|
way on UNIX.
|
|
|
|
However, as handlers run in a new thread, we can't just longjmp
|
|
out; we have to set "ld.go" to FALSE, and must return TRUE so that
|
|
no other handler - such as one that would terminate the process -
|
|
gets called.
|
|
|
|
XXX - for some reason, typing ^C to TShark, if you run this in
|
|
a Cygwin console window in at least some versions of Cygwin,
|
|
causes TShark to terminate immediately; this routine gets
|
|
called, but the main loop doesn't get a chance to run and
|
|
exit cleanly, at least if this is compiled with Microsoft Visual
|
|
C++ (i.e., it's a property of the Cygwin console window or Bash;
|
|
it happens if TShark is not built with Cygwin - for all I know,
|
|
building it with Cygwin may make the problem go away). */
|
|
ld.go = FALSE;
|
|
return TRUE;
|
|
}
|
|
#else
|
|
static void
|
|
capture_cleanup(int signum _U_)
|
|
{
|
|
/* Longjmp back to the starting point; "pcap_dispatch()", on many
|
|
UNIX platforms, just keeps looping if it gets EINTR, so if we set
|
|
"ld.go" to FALSE and return, we won't break out of it and quit
|
|
capturing. */
|
|
longjmp(ld.stopenv, 1);
|
|
}
|
|
#endif /* _WIN32 */
|
|
|
|
static void
|
|
report_counts(void)
|
|
{
|
|
#ifdef SIGINFO
|
|
/* XXX - if we use sigaction, this doesn't have to be done.
|
|
(Yes, this isn't necessary on BSD, but just in case a system
|
|
where "signal()" has AT&T semantics adopts SIGINFO....) */
|
|
signal(SIGINFO, report_counts_siginfo);
|
|
#endif /* SIGINFO */
|
|
|
|
if (!print_packet_counts) {
|
|
/* Report the count only if we aren't printing a packet count
|
|
as packets arrive. */
|
|
fprintf(stderr, "%u packets captured\n", ld.packet_count);
|
|
}
|
|
#ifdef SIGINFO
|
|
infoprint = FALSE; /* we just reported it */
|
|
#endif /* SIGINFO */
|
|
}
|
|
|
|
#ifdef SIGINFO
|
|
static void
|
|
report_counts_siginfo(int signum _U_)
|
|
{
|
|
int sav_errno = errno;
|
|
/* If we've been told to delay printing, just set a flag asking
|
|
that we print counts (if we're supposed to), otherwise print
|
|
the count of packets captured (if we're supposed to). */
|
|
if (infodelay)
|
|
infoprint = TRUE;
|
|
else
|
|
report_counts();
|
|
errno = sav_errno;
|
|
}
|
|
#endif /* SIGINFO */
|
|
#endif /* HAVE_LIBPCAP */
|
|
|
|
static int
|
|
load_cap_file(capture_file *cf, char *save_file, int out_file_type)
|
|
{
|
|
gint linktype;
|
|
int snapshot_length;
|
|
wtap_dumper *pdh;
|
|
int err;
|
|
gchar *err_info;
|
|
long data_offset;
|
|
char *save_file_string = NULL;
|
|
|
|
linktype = wtap_file_encap(cf->wth);
|
|
if (save_file != NULL) {
|
|
/* Get a string that describes what we're writing to */
|
|
save_file_string = output_file_description(save_file);
|
|
|
|
/* Set up to write to the capture file. */
|
|
snapshot_length = wtap_snapshot_length(cf->wth);
|
|
if (snapshot_length == 0) {
|
|
/* Snapshot length of input file not known. */
|
|
snapshot_length = WTAP_MAX_PACKET_SIZE;
|
|
}
|
|
pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
|
|
FALSE /* compressed */, &err);
|
|
|
|
if (pdh == NULL) {
|
|
/* We couldn't set up to write to the capture file. */
|
|
switch (err) {
|
|
|
|
case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
|
|
cmdarg_err("Capture files can't be written in that format.");
|
|
break;
|
|
|
|
case WTAP_ERR_UNSUPPORTED_ENCAP:
|
|
case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
|
|
cmdarg_err("The capture file being read can't be written in "
|
|
"that format.");
|
|
break;
|
|
|
|
case WTAP_ERR_CANT_OPEN:
|
|
cmdarg_err("The %s couldn't be created for some "
|
|
"unknown reason.", save_file_string);
|
|
break;
|
|
|
|
case WTAP_ERR_SHORT_WRITE:
|
|
cmdarg_err("A full header couldn't be written to the %s.",
|
|
save_file_string);
|
|
break;
|
|
|
|
default:
|
|
cmdarg_err("The %s could not be created: %s.", save_file_string,
|
|
wtap_strerror(err));
|
|
break;
|
|
}
|
|
goto out;
|
|
}
|
|
} else {
|
|
if (print_packet_info) {
|
|
if (!write_preamble(cf)) {
|
|
err = errno;
|
|
show_print_file_io_error(err);
|
|
goto out;
|
|
}
|
|
}
|
|
pdh = NULL;
|
|
}
|
|
while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
|
|
if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
|
|
wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
|
|
/* Either there's no read filtering or this packet passed the
|
|
filter, so, if we're writing to a capture file, write
|
|
this packet out. */
|
|
if (pdh != NULL) {
|
|
if (!wtap_dump(pdh, wtap_phdr(cf->wth),
|
|
wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
|
|
&err)) {
|
|
/* Error writing to a capture file */
|
|
show_capture_file_io_error(save_file, err, FALSE);
|
|
wtap_dump_close(pdh, &err);
|
|
exit(2);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (err != 0) {
|
|
/* Print a message noting that the read failed somewhere along the line. */
|
|
switch (err) {
|
|
|
|
case WTAP_ERR_UNSUPPORTED_ENCAP:
|
|
cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
|
|
cf->filename, err_info);
|
|
break;
|
|
|
|
case WTAP_ERR_CANT_READ:
|
|
cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
|
|
cf->filename);
|
|
break;
|
|
|
|
case WTAP_ERR_SHORT_READ:
|
|
cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
|
|
cf->filename);
|
|
break;
|
|
|
|
case WTAP_ERR_BAD_RECORD:
|
|
cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
|
|
cf->filename, err_info);
|
|
break;
|
|
|
|
default:
|
|
cmdarg_err("An error occurred while reading \"%s\": %s.",
|
|
cf->filename, wtap_strerror(err));
|
|
break;
|
|
}
|
|
if (save_file != NULL) {
|
|
/* Now close the capture file. */
|
|
if (!wtap_dump_close(pdh, &err))
|
|
show_capture_file_io_error(save_file, err, TRUE);
|
|
}
|
|
} else {
|
|
if (save_file != NULL) {
|
|
/* Now close the capture file. */
|
|
if (!wtap_dump_close(pdh, &err))
|
|
show_capture_file_io_error(save_file, err, TRUE);
|
|
} else {
|
|
if (print_packet_info) {
|
|
if (!write_finale()) {
|
|
err = errno;
|
|
show_print_file_io_error(err);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
out:
|
|
wtap_close(cf->wth);
|
|
cf->wth = NULL;
|
|
|
|
if (save_file_string != NULL)
|
|
g_free(save_file_string);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void
|
|
fill_in_fdata(frame_data *fdata, capture_file *cf,
|
|
const struct wtap_pkthdr *phdr, long offset)
|
|
{
|
|
fdata->next = NULL;
|
|
fdata->prev = NULL;
|
|
fdata->pfd = NULL;
|
|
fdata->num = cf->count;
|
|
fdata->pkt_len = phdr->len;
|
|
cum_bytes += phdr->len;
|
|
fdata->cum_bytes = cum_bytes;
|
|
fdata->cap_len = phdr->caplen;
|
|
fdata->file_off = offset;
|
|
fdata->lnk_t = phdr->pkt_encap;
|
|
fdata->abs_ts = *((nstime_t *) &phdr->ts);
|
|
fdata->flags.passed_dfilter = 0;
|
|
fdata->flags.encoding = CHAR_ASCII;
|
|
fdata->flags.visited = 0;
|
|
fdata->flags.marked = 0;
|
|
fdata->flags.ref_time = 0;
|
|
fdata->color_filter = NULL;
|
|
|
|
/* If we don't have the time stamp of the first packet in the
|
|
capture, it's because this is the first packet. Save the time
|
|
stamp of this packet as the time stamp of the first packet. */
|
|
if (nstime_is_zero(&first_ts)) {
|
|
first_ts = fdata->abs_ts;
|
|
}
|
|
|
|
/* If we don't have the time stamp of the previous displayed packet,
|
|
it's because this is the first displayed packet. Save the time
|
|
stamp of this packet as the time stamp of the previous displayed
|
|
packet. */
|
|
if (nstime_is_zero(&prev_ts)) {
|
|
prev_ts = fdata->abs_ts;
|
|
}
|
|
|
|
/* Get the time elapsed between the first packet and this packet. */
|
|
nstime_delta(&fdata->rel_ts, &fdata->abs_ts, &first_ts);
|
|
|
|
/* If it's greater than the current elapsed time, set the elapsed time
|
|
to it (we check for "greater than" so as not to be confused by
|
|
time moving backwards). */
|
|
if ((gint32)cf->elapsed_time.secs < fdata->rel_ts.secs
|
|
|| ((gint32)cf->elapsed_time.secs == fdata->rel_ts.secs && (gint32)cf->elapsed_time.nsecs < fdata->rel_ts.nsecs)) {
|
|
cf->elapsed_time = fdata->rel_ts;
|
|
}
|
|
|
|
/* Get the time elapsed between the previous displayed packet and
|
|
this packet. */
|
|
nstime_delta(&fdata->del_ts, &fdata->abs_ts, &prev_ts);
|
|
prev_ts = fdata->abs_ts;
|
|
}
|
|
|
|
/* Free up all data attached to a "frame_data" structure. */
|
|
static void
|
|
clear_fdata(frame_data *fdata)
|
|
{
|
|
if (fdata->pfd)
|
|
g_slist_free(fdata->pfd);
|
|
}
|
|
|
|
static gboolean
|
|
process_packet(capture_file *cf, long offset, const struct wtap_pkthdr *whdr,
|
|
union wtap_pseudo_header *pseudo_header, const guchar *pd)
|
|
{
|
|
frame_data fdata;
|
|
gboolean create_proto_tree;
|
|
epan_dissect_t *edt;
|
|
gboolean passed;
|
|
|
|
/* Count this packet. */
|
|
cf->count++;
|
|
|
|
/* If we're going to print packet information, or we're going to
|
|
run a read filter, or we're going to process taps, set up to
|
|
do a dissection and do so. */
|
|
if (do_dissection) {
|
|
fill_in_fdata(&fdata, cf, whdr, offset);
|
|
|
|
if (print_packet_info) {
|
|
/* Grab any resolved addresses */
|
|
|
|
if (g_resolv_flags) {
|
|
host_name_lookup_process(NULL);
|
|
}
|
|
}
|
|
|
|
passed = TRUE;
|
|
if (cf->rfcode || verbose || num_tap_filters!=0)
|
|
create_proto_tree = TRUE;
|
|
else
|
|
create_proto_tree = FALSE;
|
|
/* The protocol tree will be "visible", i.e., printed, only if we're
|
|
printing packet details, which is true if we're printing stuff
|
|
("print_packet_info" is true) and we're in verbose mode ("verbose"
|
|
is true). */
|
|
edt = epan_dissect_new(create_proto_tree, print_packet_info && verbose);
|
|
|
|
/* If we're running a read filter, prime the epan_dissect_t with that
|
|
filter. */
|
|
if (cf->rfcode)
|
|
epan_dissect_prime_dfilter(edt, cf->rfcode);
|
|
|
|
tap_queue_init(edt);
|
|
|
|
/* We only need the columns if we're printing packet info but we're
|
|
*not* verbose; in verbose mode, we print the protocol tree, not
|
|
the protocol summary. */
|
|
epan_dissect_run(edt, pseudo_header, pd, &fdata,
|
|
(print_packet_info && !verbose) ? &cf->cinfo : NULL);
|
|
|
|
tap_push_tapped_queue(edt);
|
|
|
|
/* Run the read filter if we have one. */
|
|
if (cf->rfcode)
|
|
passed = dfilter_apply_edt(cf->rfcode, edt);
|
|
else
|
|
passed = TRUE;
|
|
} else {
|
|
/* We're not running a display filter and we're not printing any
|
|
packet information, so we don't need to do a dissection, and all
|
|
packets are processed. */
|
|
edt = NULL;
|
|
passed = TRUE;
|
|
}
|
|
|
|
if (passed) {
|
|
/* Process this packet. */
|
|
if (print_packet_info) {
|
|
/* We're printing packet information; print the information for
|
|
this packet. */
|
|
print_packet(cf, edt);
|
|
|
|
/* The ANSI C standard does not appear to *require* that a line-buffered
|
|
stream be flushed to the host environment whenever a newline is
|
|
written, it just says that, on such a stream, characters "are
|
|
intended to be transmitted to or from the host environment as a
|
|
block when a new-line character is encountered".
|
|
|
|
The Visual C++ 6.0 C implementation doesn't do what is intended;
|
|
even if you set a stream to be line-buffered, it still doesn't
|
|
flush the buffer at the end of every line.
|
|
|
|
So, if the "-l" flag was specified, we flush the standard output
|
|
at the end of a packet. This will do the right thing if we're
|
|
printing packet summary lines, and, as we print the entire protocol
|
|
tree for a single packet without waiting for anything to happen,
|
|
it should be as good as line-buffered mode if we're printing
|
|
protocol trees. (The whole reason for the "-l" flag in either
|
|
tcpdump or TShark is to allow the output of a live capture to
|
|
be piped to a program or script and to have that script see the
|
|
information for the packet as soon as it's printed, rather than
|
|
having to wait until a standard I/O buffer fills up. */
|
|
if (line_buffered)
|
|
fflush(stdout);
|
|
|
|
if (ferror(stdout)) {
|
|
show_print_file_io_error(errno);
|
|
exit(2);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (do_dissection) {
|
|
epan_dissect_free(edt);
|
|
clear_fdata(&fdata);
|
|
}
|
|
return passed;
|
|
}
|
|
|
|
static void
|
|
show_capture_file_io_error(const char *fname, int err, gboolean is_close)
|
|
{
|
|
char *save_file_string;
|
|
|
|
save_file_string = output_file_description(fname);
|
|
|
|
switch (err) {
|
|
|
|
case ENOSPC:
|
|
cmdarg_err("Not all the packets could be written to the %s because there is "
|
|
"no space left on the file system.",
|
|
save_file_string);
|
|
break;
|
|
|
|
#ifdef EDQUOT
|
|
case EDQUOT:
|
|
cmdarg_err("Not all the packets could be written to the %s because you are "
|
|
"too close to, or over your disk quota.",
|
|
save_file_string);
|
|
break;
|
|
#endif
|
|
|
|
case WTAP_ERR_CANT_CLOSE:
|
|
cmdarg_err("The %s couldn't be closed for some unknown reason.",
|
|
save_file_string);
|
|
break;
|
|
|
|
case WTAP_ERR_SHORT_WRITE:
|
|
cmdarg_err("Not all the packets could be written to the %s.",
|
|
save_file_string);
|
|
break;
|
|
|
|
default:
|
|
if (is_close) {
|
|
cmdarg_err("The %s could not be closed: %s.", save_file_string,
|
|
wtap_strerror(err));
|
|
} else {
|
|
cmdarg_err("An error occurred while writing to the %s: %s.",
|
|
save_file_string, wtap_strerror(err));
|
|
}
|
|
break;
|
|
}
|
|
g_free(save_file_string);
|
|
}
|
|
|
|
static gboolean
|
|
write_preamble(capture_file *cf)
|
|
{
|
|
switch (output_action) {
|
|
|
|
case WRITE_TEXT:
|
|
return print_preamble(print_stream, cf->filename);
|
|
break;
|
|
|
|
case WRITE_XML:
|
|
if (verbose)
|
|
write_pdml_preamble(stdout);
|
|
else
|
|
write_psml_preamble(stdout);
|
|
return !ferror(stdout);
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static char *
|
|
get_line_buf(size_t len)
|
|
{
|
|
static char *line_bufp = NULL;
|
|
static size_t line_buf_len = 256;
|
|
size_t new_line_buf_len;
|
|
|
|
for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
|
|
new_line_buf_len *= 2)
|
|
;
|
|
if (line_bufp == NULL) {
|
|
line_buf_len = new_line_buf_len;
|
|
line_bufp = g_malloc(line_buf_len + 1);
|
|
} else {
|
|
if (new_line_buf_len > line_buf_len) {
|
|
line_buf_len = new_line_buf_len;
|
|
line_bufp = g_realloc(line_bufp, line_buf_len + 1);
|
|
}
|
|
}
|
|
return line_bufp;
|
|
}
|
|
|
|
static gboolean
|
|
print_columns(capture_file *cf)
|
|
{
|
|
char *line_bufp;
|
|
int i;
|
|
size_t buf_offset;
|
|
size_t column_len;
|
|
|
|
line_bufp = get_line_buf(256);
|
|
buf_offset = 0;
|
|
*line_bufp = '\0';
|
|
for (i = 0; i < cf->cinfo.num_cols; i++) {
|
|
switch (cf->cinfo.col_fmt[i]) {
|
|
case COL_NUMBER:
|
|
#ifdef HAVE_LIBPCAP
|
|
/*
|
|
* Don't print this if we're doing a live capture from a network
|
|
* interface - if we're doing a live capture, you won't be
|
|
* able to look at the capture in the future (it's not being
|
|
* saved anywhere), so the frame numbers are unlikely to be
|
|
* useful.
|
|
*
|
|
* (XXX - it might be nice to be able to save and print at
|
|
* the same time, sort of like an "Update list of packets
|
|
* in real time" capture in Wireshark.)
|
|
*/
|
|
if (capture_opts.iface != NULL)
|
|
continue;
|
|
#endif
|
|
column_len = strlen(cf->cinfo.col_data[i]);
|
|
if (column_len < 3)
|
|
column_len = 3;
|
|
line_bufp = get_line_buf(buf_offset + column_len);
|
|
sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
|
|
break;
|
|
|
|
case COL_CLS_TIME:
|
|
case COL_REL_TIME:
|
|
case COL_ABS_TIME:
|
|
case COL_ABS_DATE_TIME: /* XXX - wider */
|
|
column_len = strlen(cf->cinfo.col_data[i]);
|
|
if (column_len < 10)
|
|
column_len = 10;
|
|
line_bufp = get_line_buf(buf_offset + column_len);
|
|
sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
|
|
break;
|
|
|
|
case COL_DEF_SRC:
|
|
case COL_RES_SRC:
|
|
case COL_UNRES_SRC:
|
|
case COL_DEF_DL_SRC:
|
|
case COL_RES_DL_SRC:
|
|
case COL_UNRES_DL_SRC:
|
|
case COL_DEF_NET_SRC:
|
|
case COL_RES_NET_SRC:
|
|
case COL_UNRES_NET_SRC:
|
|
column_len = strlen(cf->cinfo.col_data[i]);
|
|
if (column_len < 12)
|
|
column_len = 12;
|
|
line_bufp = get_line_buf(buf_offset + column_len);
|
|
sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
|
|
break;
|
|
|
|
case COL_DEF_DST:
|
|
case COL_RES_DST:
|
|
case COL_UNRES_DST:
|
|
case COL_DEF_DL_DST:
|
|
case COL_RES_DL_DST:
|
|
case COL_UNRES_DL_DST:
|
|
case COL_DEF_NET_DST:
|
|
case COL_RES_NET_DST:
|
|
case COL_UNRES_NET_DST:
|
|
column_len = strlen(cf->cinfo.col_data[i]);
|
|
if (column_len < 12)
|
|
column_len = 12;
|
|
line_bufp = get_line_buf(buf_offset + column_len);
|
|
sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
|
|
break;
|
|
|
|
default:
|
|
column_len = strlen(cf->cinfo.col_data[i]);
|
|
line_bufp = get_line_buf(buf_offset + column_len);
|
|
strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
|
|
break;
|
|
}
|
|
buf_offset += column_len;
|
|
if (i != cf->cinfo.num_cols - 1) {
|
|
/*
|
|
* This isn't the last column, so we need to print a
|
|
* separator between this column and the next.
|
|
*
|
|
* If we printed a network source and are printing a
|
|
* network destination of the same type next, separate
|
|
* them with "->"; if we printed a network destination
|
|
* and are printing a network source of the same type
|
|
* next, separate them with "<-"; otherwise separate them
|
|
* with a space.
|
|
*
|
|
* We add enough space to the buffer for " <- " or " -> ",
|
|
* even if we're only adding " ".
|
|
*/
|
|
line_bufp = get_line_buf(buf_offset + 4);
|
|
switch (cf->cinfo.col_fmt[i]) {
|
|
|
|
case COL_DEF_SRC:
|
|
case COL_RES_SRC:
|
|
case COL_UNRES_SRC:
|
|
switch (cf->cinfo.col_fmt[i + 1]) {
|
|
|
|
case COL_DEF_DST:
|
|
case COL_RES_DST:
|
|
case COL_UNRES_DST:
|
|
strcat(line_bufp + buf_offset, " -> ");
|
|
buf_offset += 4;
|
|
break;
|
|
|
|
default:
|
|
strcat(line_bufp + buf_offset, " ");
|
|
buf_offset += 1;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case COL_DEF_DL_SRC:
|
|
case COL_RES_DL_SRC:
|
|
case COL_UNRES_DL_SRC:
|
|
switch (cf->cinfo.col_fmt[i + 1]) {
|
|
|
|
case COL_DEF_DL_DST:
|
|
case COL_RES_DL_DST:
|
|
case COL_UNRES_DL_DST:
|
|
strcat(line_bufp + buf_offset, " -> ");
|
|
buf_offset += 4;
|
|
break;
|
|
|
|
default:
|
|
strcat(line_bufp + buf_offset, " ");
|
|
buf_offset += 1;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case COL_DEF_NET_SRC:
|
|
case COL_RES_NET_SRC:
|
|
case COL_UNRES_NET_SRC:
|
|
switch (cf->cinfo.col_fmt[i + 1]) {
|
|
|
|
case COL_DEF_NET_DST:
|
|
case COL_RES_NET_DST:
|
|
case COL_UNRES_NET_DST:
|
|
strcat(line_bufp + buf_offset, " -> ");
|
|
buf_offset += 4;
|
|
break;
|
|
|
|
default:
|
|
strcat(line_bufp + buf_offset, " ");
|
|
buf_offset += 1;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case COL_DEF_DST:
|
|
case COL_RES_DST:
|
|
case COL_UNRES_DST:
|
|
switch (cf->cinfo.col_fmt[i + 1]) {
|
|
|
|
case COL_DEF_SRC:
|
|
case COL_RES_SRC:
|
|
case COL_UNRES_SRC:
|
|
strcat(line_bufp + buf_offset, " <- ");
|
|
buf_offset += 4;
|
|
break;
|
|
|
|
default:
|
|
strcat(line_bufp + buf_offset, " ");
|
|
buf_offset += 1;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case COL_DEF_DL_DST:
|
|
case COL_RES_DL_DST:
|
|
case COL_UNRES_DL_DST:
|
|
switch (cf->cinfo.col_fmt[i + 1]) {
|
|
|
|
case COL_DEF_DL_SRC:
|
|
case COL_RES_DL_SRC:
|
|
case COL_UNRES_DL_SRC:
|
|
strcat(line_bufp + buf_offset, " <- ");
|
|
buf_offset += 4;
|
|
break;
|
|
|
|
default:
|
|
strcat(line_bufp + buf_offset, " ");
|
|
buf_offset += 1;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case COL_DEF_NET_DST:
|
|
case COL_RES_NET_DST:
|
|
case COL_UNRES_NET_DST:
|
|
switch (cf->cinfo.col_fmt[i + 1]) {
|
|
|
|
case COL_DEF_NET_SRC:
|
|
case COL_RES_NET_SRC:
|
|
case COL_UNRES_NET_SRC:
|
|
strcat(line_bufp + buf_offset, " <- ");
|
|
buf_offset += 4;
|
|
break;
|
|
|
|
default:
|
|
strcat(line_bufp + buf_offset, " ");
|
|
buf_offset += 1;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
strcat(line_bufp + buf_offset, " ");
|
|
buf_offset += 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return print_line(print_stream, 0, line_bufp);
|
|
}
|
|
|
|
static gboolean
|
|
print_packet(capture_file *cf, epan_dissect_t *edt)
|
|
{
|
|
print_args_t print_args;
|
|
|
|
if (verbose) {
|
|
/* Print the information in the protocol tree. */
|
|
switch (output_action) {
|
|
|
|
case WRITE_TEXT:
|
|
print_args.to_file = TRUE;
|
|
print_args.format = print_format;
|
|
print_args.print_summary = !verbose;
|
|
print_args.print_hex = verbose && print_hex;
|
|
print_args.print_formfeed = FALSE;
|
|
print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
|
|
|
|
/* init the packet range */
|
|
packet_range_init(&print_args.range);
|
|
|
|
if (!proto_tree_print(&print_args, edt, print_stream))
|
|
return FALSE;
|
|
if (!print_hex) {
|
|
/* "print_hex_data()" will put out a leading blank line, as well
|
|
as a trailing one; print one here, to separate the packets,
|
|
only if "print_hex_data()" won't be called. */
|
|
if (!print_line(print_stream, 0, ""))
|
|
return FALSE;
|
|
}
|
|
break;
|
|
|
|
case WRITE_XML:
|
|
proto_tree_write_pdml(edt, stdout);
|
|
printf("\n");
|
|
return !ferror(stdout);
|
|
}
|
|
} else {
|
|
/* Just fill in the columns. */
|
|
epan_dissect_fill_in_columns(edt);
|
|
|
|
/* Now print them. */
|
|
switch (output_action) {
|
|
|
|
case WRITE_TEXT:
|
|
if (!print_columns(cf))
|
|
return FALSE;
|
|
break;
|
|
|
|
case WRITE_XML:
|
|
proto_tree_write_psml(edt, stdout);
|
|
return !ferror(stdout);
|
|
}
|
|
}
|
|
if (print_hex) {
|
|
if (!print_hex_data(print_stream, edt))
|
|
return FALSE;
|
|
if (!print_line(print_stream, 0, ""))
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
write_finale(void)
|
|
{
|
|
switch (output_action) {
|
|
|
|
case WRITE_TEXT:
|
|
return print_finale(print_stream);
|
|
break;
|
|
|
|
case WRITE_XML:
|
|
if (verbose)
|
|
write_pdml_finale(stdout);
|
|
else
|
|
write_psml_finale(stdout);
|
|
return !ferror(stdout);
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
show_print_file_io_error(int err)
|
|
{
|
|
switch (err) {
|
|
|
|
case ENOSPC:
|
|
cmdarg_err("Not all the packets could be printed because there is "
|
|
"no space left on the file system.");
|
|
break;
|
|
|
|
#ifdef EDQUOT
|
|
case EDQUOT:
|
|
cmdarg_err("Not all the packets could be printed because you are "
|
|
"too close to, or over your disk quota.");
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
cmdarg_err("An error occurred while printing packets: %s.",
|
|
strerror(err));
|
|
break;
|
|
}
|
|
}
|
|
|
|
static const char *
|
|
cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
|
|
int file_type)
|
|
{
|
|
const char *errmsg;
|
|
static char errmsg_errno[1024+1];
|
|
|
|
if (err < 0) {
|
|
/* Wiretap error. */
|
|
switch (err) {
|
|
|
|
case WTAP_ERR_NOT_REGULAR_FILE:
|
|
errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
|
|
break;
|
|
|
|
case WTAP_ERR_FILE_UNKNOWN_FORMAT:
|
|
/* Seen only when opening a capture file for reading. */
|
|
errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
|
|
break;
|
|
|
|
case WTAP_ERR_UNSUPPORTED:
|
|
/* Seen only when opening a capture file for reading. */
|
|
g_snprintf(errmsg_errno, sizeof(errmsg_errno),
|
|
"The file \"%%s\" isn't a capture file in a format TShark understands.\n"
|
|
"(%s)", err_info);
|
|
g_free(err_info);
|
|
errmsg = errmsg_errno;
|
|
break;
|
|
|
|
case WTAP_ERR_CANT_WRITE_TO_PIPE:
|
|
/* Seen only when opening a capture file for writing. */
|
|
g_snprintf(errmsg_errno, sizeof(errmsg_errno),
|
|
"The file \"%%s\" is a pipe, and %s capture files can't be "
|
|
"written to a pipe.", wtap_file_type_string(file_type));
|
|
errmsg = errmsg_errno;
|
|
break;
|
|
|
|
case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
|
|
/* Seen only when opening a capture file for writing. */
|
|
errmsg = "TShark doesn't support writing capture files in that format.";
|
|
break;
|
|
|
|
case WTAP_ERR_UNSUPPORTED_ENCAP:
|
|
if (for_writing)
|
|
errmsg = "TShark can't save this capture in that format.";
|
|
else {
|
|
g_snprintf(errmsg_errno, sizeof(errmsg_errno),
|
|
"The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
|
|
"(%s)", err_info);
|
|
g_free(err_info);
|
|
errmsg = errmsg_errno;
|
|
}
|
|
break;
|
|
|
|
case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
|
|
if (for_writing)
|
|
errmsg = "TShark can't save this capture in that format.";
|
|
else
|
|
errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
|
|
break;
|
|
|
|
case WTAP_ERR_BAD_RECORD:
|
|
/* Seen only when opening a capture file for reading. */
|
|
g_snprintf(errmsg_errno, sizeof(errmsg_errno),
|
|
"The file \"%%s\" appears to be damaged or corrupt.\n"
|
|
"(%s)", err_info);
|
|
g_free(err_info);
|
|
errmsg = errmsg_errno;
|
|
break;
|
|
|
|
case WTAP_ERR_CANT_OPEN:
|
|
if (for_writing)
|
|
errmsg = "The file \"%s\" could not be created for some unknown reason.";
|
|
else
|
|
errmsg = "The file \"%s\" could not be opened for some unknown reason.";
|
|
break;
|
|
|
|
case WTAP_ERR_SHORT_READ:
|
|
errmsg = "The file \"%s\" appears to have been cut short"
|
|
" in the middle of a packet or other data.";
|
|
break;
|
|
|
|
case WTAP_ERR_SHORT_WRITE:
|
|
errmsg = "A full header couldn't be written to the file \"%s\".";
|
|
break;
|
|
|
|
default:
|
|
g_snprintf(errmsg_errno, sizeof(errmsg_errno),
|
|
"The file \"%%s\" could not be %s: %s.",
|
|
for_writing ? "created" : "opened",
|
|
wtap_strerror(err));
|
|
errmsg = errmsg_errno;
|
|
break;
|
|
}
|
|
} else
|
|
errmsg = file_open_error_message(err, for_writing);
|
|
return errmsg;
|
|
}
|
|
|
|
/*
|
|
* Open/create errors are reported with an console message in TShark.
|
|
*/
|
|
static void
|
|
open_failure_message(const char *filename, int err, gboolean for_writing)
|
|
{
|
|
fprintf(stderr, "tshark: ");
|
|
fprintf(stderr, file_open_error_message(err, for_writing), filename);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
cf_status_t
|
|
cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
|
|
{
|
|
wtap *wth;
|
|
gchar *err_info;
|
|
char err_msg[2048+1];
|
|
|
|
wth = wtap_open_offline(fname, err, &err_info, FALSE);
|
|
if (wth == NULL)
|
|
goto fail;
|
|
|
|
/* The open succeeded. Fill in the information for this file. */
|
|
|
|
/* Initialize all data structures used for dissection. */
|
|
init_dissection();
|
|
|
|
cf->wth = wth;
|
|
cf->f_datalen = 0; /* not used, but set it anyway */
|
|
|
|
/* Set the file name because we need it to set the follow stream filter.
|
|
XXX - is that still true? We need it for other reasons, though,
|
|
in any case. */
|
|
cf->filename = g_strdup(fname);
|
|
|
|
/* Indicate whether it's a permanent or temporary file. */
|
|
cf->is_tempfile = is_tempfile;
|
|
|
|
/* If it's a temporary capture buffer file, mark it as not saved. */
|
|
cf->user_saved = !is_tempfile;
|
|
|
|
cf->cd_t = wtap_file_type(cf->wth);
|
|
cf->count = 0;
|
|
cf->drops_known = FALSE;
|
|
cf->drops = 0;
|
|
cf->snap = wtap_snapshot_length(cf->wth);
|
|
if (cf->snap == 0) {
|
|
/* Snapshot length not known. */
|
|
cf->has_snap = FALSE;
|
|
cf->snap = WTAP_MAX_PACKET_SIZE;
|
|
} else
|
|
cf->has_snap = TRUE;
|
|
nstime_set_zero(&cf->elapsed_time);
|
|
nstime_set_zero(&first_ts);
|
|
nstime_set_zero(&prev_ts);
|
|
|
|
return CF_OK;
|
|
|
|
fail:
|
|
g_snprintf(err_msg, sizeof err_msg,
|
|
cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
|
|
cmdarg_err("%s", err_msg);
|
|
return CF_ERROR;
|
|
}
|
|
|
|
|
|
/*
|
|
* General errors are reported with an console message in TShark.
|
|
*/
|
|
static void
|
|
failure_message(const char *msg_format, va_list ap)
|
|
{
|
|
fprintf(stderr, "tshark: ");
|
|
vfprintf(stderr, msg_format, ap);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
/*
|
|
* Read errors are reported with an console message in TShark.
|
|
*/
|
|
static void
|
|
read_failure_message(const char *filename, int err)
|
|
{
|
|
cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
|
|
filename, strerror(err));
|
|
}
|
|
|
|
/*
|
|
* Report an error in command-line arguments.
|
|
*/
|
|
void
|
|
cmdarg_err(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
fprintf(stderr, "tshark: ");
|
|
vfprintf(stderr, fmt, ap);
|
|
fprintf(stderr, "\n");
|
|
va_end(ap);
|
|
}
|
|
|
|
/*
|
|
* Report additional information for an error in command-line arguments.
|
|
*/
|
|
void
|
|
cmdarg_err_cont(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
fprintf(stderr, "\n");
|
|
va_end(ap);
|
|
}
|
|
|
|
|
|
/****************************************************************************************************************/
|
|
/* indication report "dummies", needed for capture_loop.c */
|
|
|
|
#ifdef HAVE_LIBPCAP
|
|
|
|
/** Report a new capture file having been opened. */
|
|
void
|
|
report_new_capture_file(const char *filename)
|
|
{
|
|
/* shouldn't happen */
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
/** Report a number of new packets captured. */
|
|
void
|
|
report_packet_count(int packet_count)
|
|
{
|
|
/* shouldn't happen */
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
/** Report the packet drops once the capture finishes. */
|
|
void
|
|
report_packet_drops(int drops)
|
|
{
|
|
/* shouldn't happen */
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
/** Report an error in the capture. */
|
|
void
|
|
report_capture_error(const char *errmsg, const char *secondary_error_msg)
|
|
{
|
|
cmdarg_err(errmsg);
|
|
cmdarg_err_cont(secondary_error_msg);
|
|
}
|
|
|
|
/** Report an error with a capture filter. */
|
|
void
|
|
report_cfilter_error(const char *cfilter, const char *errmsg)
|
|
{
|
|
|
|
cmdarg_err(
|
|
"Invalid capture filter: \"%s\"!\n"
|
|
"\n"
|
|
"That string isn't a valid capture filter (%s).\n"
|
|
"See the User's Guide for a description of the capture filter syntax.",
|
|
cfilter, errmsg);
|
|
}
|
|
|
|
#endif /* HAVE_LIBPCAP */
|
|
|
|
|
|
/****************************************************************************************************************/
|
|
/* signal pipe "dummies", needed for capture_loop.c */
|
|
|
|
#ifdef HAVE_LIBPCAP
|
|
|
|
#ifdef _WIN32
|
|
gboolean
|
|
signal_pipe_check_running(void)
|
|
{
|
|
/* currently, no check required */
|
|
return TRUE;
|
|
}
|
|
#endif /* _WIN32 */
|
|
|
|
#endif /* HAVE_LIBPCAP */
|